JP2010119946A - Air flow generator - Google Patents

Abstract

An object of the present invention is to provide an air flow generation device that effectively functions as an aerodynamic control device even for an object having a surface portion rich in three-dimensional changes.
The present invention provides an air flow generator having an electrode pair provided on a surface portion of an object and generating an air flow by generating plasma, wherein the electrode pair is a reference surface portion of the surface portions. The first electrode pair 1 that generates the first air flow 5 along the line 3 and the second air flow 6 in the direction intersecting the direction along the reference surface part 3 among the surface parts are generated. The second electrode pair 2 is provided.
[Selection] Figure 5

Description

  The present invention relates to an air flow generator that applies an air flow induction phenomenon caused by discharge plasma.

2. Description of the Related Art Conventionally, as an air flow generation device, one that induces an air flow by discharge plasma generated by applying a voltage to an electrode pair is known (see, for example, Patent Document 1). The air flow generator includes a first electrode exposed on the same surface as the surface of the dielectric, and a second electrode disposed in a step with respect to the first electrode by being embedded in the dielectric. It has.
In this air flow generator, an air flow is generated from the first electrode toward the second electrode by the discharge plasma.
By applying such an air flow generator to an aircraft wing, for example, it is possible to generate an air flow in the boundary layer between the surface portion of the wing and the air flow, and thus control the aerodynamic characteristics of the aircraft, for example. Can be considered.

JP 2007-317656 A

By the way, in the conventional airflow generator (for example, refer patent document 1), the flow of the air which generate | occur | produces on the surface part of an object turns into a two-dimensional flow (plane flow). Therefore, the conventional airflow generator functions effectively as an aerodynamic control device for an object with a smooth surface, in other words, a boundary layer that transitions from laminar flow to turbulent flow through a cascade process. To do.
However, the surface portion of the automobile has a recess formed by, for example, a hood, a fender, a groove-like seam formed around the bumper, a wheel house, and the like. And convex portions are formed. Even if the conventional airflow generator is applied to an object such as an automobile having a surface portion rich in such three-dimensional changes, it is bypassed to the airflow at the recessed portion or the downstream portion of the convex portion. Since the transition occurs, there is a problem that the conventional airflow generation device does not function effectively as an aerodynamic control device.
Therefore, an airflow generator that effectively functions as an aerodynamic control device for an object having a surface portion rich in three-dimensional changes is desired.

  Therefore, an object of the present invention is to provide an airflow generator that effectively functions as an aerodynamic control device even for an object having a surface portion rich in three-dimensional changes.

The present invention for solving the above problems is an air flow generator having an electrode pair provided on a surface portion of an object and generating an air flow by generating plasma, wherein the electrode pair is a reference surface of the surface portion. A first electrode pair that generates a first air flow along the portion, and a second electrode that generates a second air flow in a direction intersecting the direction along the reference surface portion of the surface portion And a pair.
According to this air flow generation device, based on the direction of the first air flow generated along the reference surface portion, the second air flow in a direction intersecting the direction along the reference surface portion It is possible to generate a three-dimensional air flow including a controllable vortex, which is different from the two-dimensional air flow generated by an aerodynamic control device (see, for example, Patent Document 1).
The airflow generation device of the present invention effectively functions as an aerodynamic control device even for an object having a surface portion rich in three-dimensional changes, such as an automobile, by this three-dimensional airflow. be able to.

Further, in such an air flow generation device, one electrode and the other electrode of the second electrode pair are arranged so as to be aligned along the generation direction of the second air flow. It is desirable.
According to this air flow generation device, the direction of the second air flow can be directly defined by the arrangement of the two electrodes constituting the second electrode pair, so that three-dimensional air flow control is possible. Can be performed more easily.

In such an air flow generation device, it is preferable that the second electrode pair is provided on a guide surface portion extending in a direction in which the second air flow is generated.
According to this air flow generator, the second air flow is stabilized by the guide surface portion, so that a desired three-dimensional air flow can be easily obtained.

In such an airflow generator, it is desirable that the second electrode pair is provided at a twisted position with respect to the first electrode pair.
According to this air flow generator, a three-dimensional air flow with more directivity can be generated, so that the characteristics of the air flow can be finely controlled.

And this invention which solves the said subject is an airflow generator provided in the surface part of the object, and has an electrode pair which generates an airflow by generation | occurrence | production of plasma, Comprising: The said electrode pair is the said surface part. A first electrode pair that generates a first air flow along a reference surface portion; and a second electrode that generates a second air flow in a direction intersecting the direction along the reference surface portion of the surface portion. An electrode unit including a plurality of electrode units, and a plurality of the electrode units may be provided.
According to this air flow generator, since a plurality of electrode units having the first electrode pair and the second electrode pair are disposed, an electrode structure corresponding to the mounting location can be configured.
Moreover, according to this airflow generator, since a plurality of electrode units are combined, a stronger and more stable three-dimensional airflow can be generated.

Further, in such an air flow generation device, the second electrode pair of the electrode unit is provided on a guide surface portion extending in the generation direction of the second air flow, and the adjacent electrode units are It is desirable that the guide surface portions are arranged so as to extend in directions intersecting each other.
According to this air flow generation device, the second air flow is stabilized by the guide surface portion, and a plurality of electrode units are combined, so that a stronger and more stable three-dimensional air flow can be generated.

In such an air flow generator, the electrode unit is preferably formed of a dielectric provided with the first electrode pair and the second electrode pair.
According to this air flow generation device, the configuration of the electrode unit can be simplified, so that the productivity of the air flow generation device including a plurality of electrode units can be increased.

  The present invention can provide an airflow generation device that effectively functions as an aerodynamic control device even for an object having a surface portion rich in three-dimensional changes.

Next, an embodiment of the air flow generator of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 1 is a perspective view of an automobile in which an airflow generator according to an embodiment of the present invention is incorporated. FIG. 2 is a perspective view schematically showing a state where the airflow generation device according to the embodiment of the present invention is viewed from the direction II of FIG. 3A is a cross-sectional view taken along line IIIa-IIIa in FIG. 2, and FIG. 3B is a cross-sectional view taken along line IIIb-IIIb in FIG. FIGS. 4A to 4D are process diagrams showing a state in which an air flow is generated at the electrode pair constituting the air flow generating device according to the embodiment of the present invention. FIG. 5 is a perspective view schematically showing how a three-dimensional air flow is generated in the air flow generator according to the embodiment of the present invention.
In addition, although the airflow generator according to the present embodiment is disposed on both the left and right sides of the automobile, they have the same structure except that they are symmetrical to each other. Only the air flow generator that has been used will be described, and the description of the right-hand side will be omitted.
In the following description, the front-rear, left-right, up-down directions are based on the direction shown in FIG.

  As shown in FIG. 1, the airflow generation device A1 according to the present embodiment is disposed on a side surface portion S of a front bumper B located in front of a front wheel house H of an automobile V. The front bumper B corresponds to the “object” in the claims, and the side surface portion S corresponds to the “surface portion”.

  The air flow generator A1 includes an electrode pair including a first electrode pair 1 and a second electrode pair 2, and the first electrode pair 1 and the second electrode pair 2 are arranged on the front side. The bumper B is disposed on the side surface S. More specifically, the first electrode pair 1 extends in the vertical direction at the side surface portion S, and the second electrode pair 2 extends from the lower end of the first electrode pair 1 to the rear of the front bumper B. It is extended toward.

As shown in FIG. 2, the side surface S where the first electrode pair 1 and the second electrode pair 2 are arranged includes a reference surface portion 3 and an intersecting surface portion 4 that intersects the reference surface portion 3. have.
More specifically, the intersecting surface portion 4 in the present embodiment is inclined with respect to the reference surface portion 3 so that the upper end is displaced to the right side, that is, the inner side in the vehicle width direction, from the lower end. The first electrode pair 1 and the second electrode pair 2 disposed on each of the reference surface portion 3 and the intersecting surface portion 4 are disposed at twisted positions.

As shown in FIG. 3A, in the reference surface portion 3, the first electrode pair 1 generates the first air flow 5 by the generation of discharge plasma P (see FIG. 4A and the like) described later. It is supposed to be.
Further, as shown in FIG. 3B, at the intersecting surface portion 4, the second electrode pair 2 causes the second air flow 6 to be generated by the generation of discharge plasma P (see FIG. 4A and the like) described later. It is supposed to occur.
Incidentally, the first air flow 5 flows in a direction along the reference surface portion 3, and the second air flow 6 flows in a direction along the intersecting surface portion 4. That is, the second air flow 6 flows in a direction intersecting with the direction along the reference surface portion 3.
Note that the intersecting surface portion 4 in the present embodiment also functions as a guide surface portion G that guides the generated second air flow 6 in the above-described direction. In other words, the second electrode pair 2 is provided on the guide surface portion G extending in the direction in which the second air flow 6 is generated.

Next, the first electrode and the second electrode constituting the first electrode pair 1 and the second electrode pair 2 will be described.
As shown in FIG. 2, the first electrode pair 1 includes a first electrode 11 and a second electrode 12 positioned on the rear side of the first electrode 11.
The first electrode pair 1 is arranged such that the first electrode 11 and the second electrode 12 form a step L as shown in FIG. Specifically, the first electrode 11 is located on the left side of the second electrode 12 by a level difference L, in other words, on the outer side in the vehicle width direction. Such first electrode 11 and second electrode 12 are embedded in the dielectric D. However, the end E of the first electrode 11 near the second electrode 12 is exposed to the air.
An insulating member I is disposed between the base material 9 of the front bumper B (see FIG. 1) and the dielectric D, and the end of the first electrode 11 is disposed on the surface of the dielectric D. A heat-resistant coating film 17a is formed except for the end face where E is exposed. A normal coating film 17b is formed on the surface of the base material 9 of the front bumper B (see FIG. 1).

As shown in FIG. 2, the second electrode pair 2 includes a first electrode 21 and a second electrode 22 positioned above the first electrode 21.
The second electrode pair 2 is arranged so that the first electrode 21 and the second electrode 22 form a step L as shown in FIG. 3B. Specifically, the first electrode 21 is located on the left side of the second electrode 22 by a level difference L, in other words, on the outer side in the vehicle width direction.
In the second electrode pair 2, the first electrode 21 and the second electrode 22 are arranged so as to be aligned in the direction in which the second air flow 6 is generated.
The first electrode 21 and the second electrode 22 as described above are formed on the dielectric D in the same manner as the first electrode 11 and the second electrode 12 (see FIG. 3A) of the first electrode pair 1. Buried. However, the end E of the first electrode 21 near the second electrode 22 is exposed to the air.
As with the first electrode pair 1 (see FIG. 3A), an insulating member I is disposed between the base material 9 of the front bumper B (see FIG. 1) and the dielectric D. On the surface of the dielectric D, a heat-resistant coating film 17a is formed except for the end face where the end E of the first electrode 11 is exposed. A normal coating film 17b is formed on the surface of the base material 9 of the front bumper B (see FIG. 1).

  As shown in FIG. 2, the first electrodes 11 and 21 and the second electrodes 12 and 22 constituting the first electrode pair 1 and the second electrode pair 2 are parallel to the power source 7. It is connected to the. In the present embodiment, the power source 7 includes a first electrode so as to induce discharge such as corona discharge, pulse discharge, and barrier discharge in the first electrode pair 1 and the second electrode pair 2 to generate discharge plasma. A high voltage is applied between the first electrode 21 and the second electrode 12 and between the first electrode 21 and the second electrode 22, and an AC power supply is specifically used. A control unit C is disposed between the first electrodes 11 and 21 and the power source 7. The control unit C is configured to adjust the electrolytic strength between the first electrode 11 and the second electrode 12 and between the first electrode 21 and the second electrode 22.

  Next, the function and effect of the airflow generator A1 according to this embodiment will be described. FIGS. 4A to 4D referred to here are process diagrams showing a state in which an air flow is generated in the electrode pair. FIG. 5 is a perspective view schematically showing how a three-dimensional air flow is generated in the air flow generator according to the present embodiment. The manner in which the air flow is generated in each of the first electrode pair 1 and the second electrode pair 2 is the same except that the intersecting surface portion 4 intersects the reference surface portion 3, so Here, the state in which the first air flow 5 is generated in the first electrode pair 1 will be described, and the description in which the second air flow 6 is generated in the second electrode pair 2 will be omitted.

Here, the case where the polarity of the 1st electrode 11 to which the voltage was applied by the power supply 7 is positive and the polarity of the 2nd electrode 12 is negative is demonstrated first.
As shown in FIG. 4A, when a voltage is applied to the first electrode pair 1, a discharge plasma P is generated between the first electrode 11 and the second electrode 12. At this time, since the first electrode 11 and the second electrode 12 are formed with the step L (see FIG. 3A) as described above, the first electrode 11 and the second electrode 12 are on the first electrode 11 side on the dielectric D. A discharge plasma P is formed in which the side swells and the second electrode 12 side becomes flat. On the other hand, the negative ions 15 constituting the discharge plasma P move to the first electrode 11 side with positive polarity, and the positive ions 14 move to the second electrode 12 side with negative polarity. Although not shown, the negative ions 15 and positive ions 14 moving to the first electrode 11 side and the second electrode 12 side collide with air particles (not shown) outside the discharge plasma P. At this time, since the discharge plasma P on the second electrode 12 side is flat, the momentum in which the positive ions 14 collide with the air particles is larger than the momentum in which the negative ions 15 collide with the air particles. Become.
As a result, as shown in FIG. 4B, a momentum mv is generated in the direction in which the cation 14 collides with the air particle Air. Then, more air (air particles Air) for maintaining the plasma state is supplied to the side on which the discharge plasma P swells than on the flat side. As a result, momentum m′v ′ is generated from the side on which the discharge plasma P swells to the flat side. That is, the first electrode pair 1 generates an air flow from the left side to the right side in FIG. 4B.

  Further, as shown in FIG. 4A, since the discharge plasma P swells on the first electrode 11 side, the movement starting point 16 of the anion 15 and the cation 14 is closer to the first electrode 11. Formed. As a result, even if the moving distance of the cation 14 becomes longer than the moving distance of the anion 15, the first electrode pair 1 generates an air flow from the left side to the right side in FIG. 4B.

Next, the case where the polarity of the first electrode 11 to which a voltage is applied by the power source 7 (see FIG. 2) is negative and the polarity of the second electrode 12 is positive will be described.
As shown in FIG. 4C, the first electrode 11 and the second electrode 12 have the step L (see FIG. 3A) as described above. A discharge plasma P is formed in which the first electrode 11 side swells and the second electrode 12 side becomes flat. As a result, as shown in FIG. 4D, momentum mv is generated in the direction in which the negative ions 15 collide with the air particles Air. And the air particle Air for maintaining a plasma state is supplied to the side where the discharge plasma P swells more than the flat side. As a result, momentum m′v ′ is generated from the side on which the discharge plasma P swells to the flat side. That is, the first electrode pair 1 generates an air flow from the left side to the right side of FIG. 4D even when the polarities of the first electrode 11 and the second electrode 12 are switched.

  Further, as shown in FIG. 4C, the discharge plasma P swells on the first electrode 11 side, so that the movement starting point 16 of the anion 15 and the cation 14 is the same as that of the first electrode 11. Even if the polarity with the second electrode 12 is changed, it does not change. Therefore, the first electrode pair 1 generates an air flow from the left side to the right side in FIG.

Next, how the three-dimensional airflow is generated in the airflow generator A1 according to this embodiment will be described.
As shown in FIG. 5, by applying a voltage to each of the first electrode pair 1 and the second electrode pair 2, as described above, in the direction from the first electrode 11 to the second electrode 12. An air flow is formed along. That is, a first air flow 5 that flows along the reference surface portion 3 is formed by the first electrode pair 1, and a second air flow 6 that flows along the intersecting surface portion 4 by the second electrode pair 2. Is formed.
As a result, the first air flow 5 flows from the front side to the rear side of the side surface portion S of the front bumper B shown in FIG. 1, whereas the second air flow 6 moves from the lower side to the diagonally upper right side. It flows toward the inside, that is, toward the inside in the vehicle width direction.
Therefore, in this air flow generator A1, the first air flow 5 and the second air flow 6 are obliquely crossed to form a vortex flow, and three-dimensionally in the same direction as the direction of the first air flow 5. A typical air flow W is formed. Such a three-dimensional air flow W is formed, for example, as an air flow that flows spirally toward the rear.

  The air flow generation device A1 as described above is based on a three-dimensional air flow W that is different from the two-dimensional air flow (planar flow) generated by a conventional air flow generation device (see, for example, Patent Document 1). For example, it is possible to effectively function as an aerodynamic control device even for an object rich in three-dimensional changes, such as around the front bumper B shown in FIG. 1 in the present embodiment.

  Further, as shown in FIG. 5, the air flow generator A <b> 1 arranges the first electrode 21 and the second electrode 22 of the second electrode pair 2 along the generation direction of the second air flow 6. Therefore, the direction of the second air flow 6 can be directly defined by these arrangements. As a result, since the direction of the second air flow 6 can be directly defined by the arrangement of the two electrodes 21 and 22, the three-dimensional air flow W can be controlled more easily.

  Moreover, in this air flow generator A1, since the 2nd electrode pair 2 is provided in the guide surface part G extended in the generation | occurrence | production direction of the 2nd air flow 6, the 2nd air flow 6 is the guide surface part G. To stabilize. As a result, according to the air flow generator A1, a desired three-dimensional air flow W can be easily obtained.

  In addition, this invention is implemented in various forms, without being limited to the said embodiment. Other embodiments will be described below. In other embodiment here, the same code | symbol is attached | subjected about the component similar to the said embodiment, and the detailed description is abbreviate | omitted.

  In the embodiment, the air flow generator A1 having one each of the first electrode pair 1 disposed on the reference surface portion 3 and the second electrode pair 2 disposed on the intersecting surface portion 4 has been described. However, the present invention may be an airflow generator in which the airflow generator A1 is used as one electrode unit and a plurality of electrode units are arranged. FIG. 6 referred to here is a configuration explanatory diagram of an airflow generation device including a plurality of electrode units each having a first electrode pair disposed on the reference surface portion and a second electrode pair disposed on the intersecting surface portion. It is. FIGS. 7A and 7B are configuration explanatory views of an air flow generation device in which a plurality of air flow generation devices including a plurality of electrode units are further provided.

As shown in FIG. 6, the airflow generator A2 includes an electrode unit 31 having the same structure as the airflow generator A1 according to the embodiment, and an electrode having a structure that is vertically symmetric with respect to the electrode unit 31. Unit 32. Incidentally, each of the electrode units 31 and 32 has a dielectric D (FIG. 3A) provided with the first electrode pair 1 and the second electrode pair 2 in the same manner as the airflow generator A1 according to the embodiment. ))).
And in this airflow generator A2, the crossing surface parts 4 and 4 of the two electrode units 31 and 32 are faced | matched, and the two guide surface parts G and G comprise the V-shaped slope. That is, the guide surface portions G and G extend in a direction intersecting each other. The second electrode pairs 2 and 2 face each other with the guide surface portions G and G interposed therebetween.

According to this air flow generator A2, since the plurality of electrode units 31 and 32 having the first electrode pair 1 and the second electrode pair 2 are disposed, an electrode structure corresponding to the mounting location is configured. Can do.
Moreover, according to this airflow generator A2, since the electrode units 31 and 32 are combined, it is possible to generate a stronger and more stable three-dimensional airflow W.
Further, according to the air flow generator A2, the second air flow 6 is stabilized by the guide surface portion G, and the plurality of electrode units 31 and 32 are combined, so that stronger and more stable three-dimensional air is obtained. A flow W can be generated.
In this airflow generator A2, each of the electrode units 31, 32 is formed of a dielectric D (see FIG. 3A) provided with a first electrode pair 1 and a second electrode pair 2. Since the structure of each electrode unit 31 and 32 can be simplified, the productivity can be improved.

  And this airflow generator A2 extends more than two electrode units 31, 32 ... in the direction in which the guide surface portions G, G ... intersect each other, as indicated by broken lines in FIG. It may be arranged so as to exist.

  Then, as shown in FIG. 7A, the air flow generator of the present invention is different from the air flow generator A2 shown in FIG. 6 in that the flow directions of the three-dimensional air flow W are the same. Two or more may be arranged side by side.

  Then, as shown in FIG. 7 (b), the air flow generator of the present invention is arranged so that the air flow generator A2 shown in FIG. As shown in FIG. 6, the air flow generator A2 shown in FIG. 6 may be arranged in an L shape in plan view. In this case, a plurality of airflow generators A2 are arranged so that the collided three-dimensional airflow W flows in the desired direction (rearward in this embodiment) as a result.

  Moreover, in the said embodiment, when the 1st electrode pair 1 is arrange | positioned, the airflow generator A1 which has the reference | standard surface part 3 and the cross | intersection surface part 4 in which the 2nd electrode pair 2 is each arrange | positioned 1 each. However, the present invention may be an airflow generator that includes a plurality of reference surface portions 3. FIG. 8 referred to here is an explanatory diagram of a configuration of an airflow generation device including a plurality of reference surface portions.

  As shown in FIG. 8, the airflow generator A3 includes two reference surface portions 23a and a reference surface portion 23b. More specifically, the reference surface portion 23b is formed closer to the right side (inward in the vehicle width direction) than the reference surface portion 23a. The first electrode pairs 1 and 1 disposed on the reference surface portions 23a and 23b respectively generate the first airflows 5 and 5 in the direction along the reference surface portions 23a and 23b.

The intersecting surface portion 24 intersecting with the reference surface portions 23a and 23b is formed by an inclined surface that connects the steps of the reference surface portion 23a and the reference surface portion 23b. More specifically, the intersecting surface portion 24 is formed so as to draw an arc in the vertical direction shown in FIG. The second electrode pair 2 is arranged along the intersecting surface portion 24. That is, the second electrode pair 2 is provided at a twisted position with respect to the first electrode pair 1. Here, “the position of twist with respect to the first electrode pair 1” means non-parallel to the first electrode pair 1 and does not intersect. Therefore, in addition to the one formed so as to draw an arc in the vertical direction shown in FIG. 8, the second electrode that is non-parallel to the first electrode pair 1 and does not intersect but extends linearly. The pair 2 is also provided at a twisted position with respect to the first electrode pair 1.
In FIG. 8, reference numeral 6 represents a second air flow generated by the second electrode pair 2.

  According to such an air flow generation device A3, since it is possible to generate a three-dimensional air flow W with more directivity, it is possible to finely control the characteristics of the three-dimensional air flow W. it can.

  Further, the present invention may be an airflow generator in which the airflow generator A3 shown in FIG. 8 is a single electrode unit and a plurality of electrode units are arranged. FIG. 9A referred to here is an airflow generator having a plurality of electrode units each having a first electrode pair disposed on the reference surface portion and a second electrode pair disposed on the intersecting surface portion. FIG. 9B is a configuration explanatory diagram of an air flow generation device in which a plurality of air flow generation devices including a plurality of electrode units are further arranged.

As shown in FIG. 9A, this air flow generator A4 has an electrode unit 33 having the same structure as the air flow generator A3 shown in FIG. The electrode unit 34 is provided. Incidentally, each of the electrode units 33 and 34 is similar to the air flow generator A1 according to the above-described embodiment, and is a dielectric D provided with the first electrode pair 1 and the second electrode pair 2 (FIG. 3A ))).
In the air flow generator A4, the intersecting surface portions 24, 24 of the two electrode units 33, 34 are connected together to form an arc surrounding the reference surface portions 23b, 23b.
Therefore, according to the air flow generator A4, the characteristics of the three-dimensional air flow W can be finely controlled, and a stronger and more stable three-dimensional air flow W can be generated. .

  Moreover, as shown in FIG.9 (b), this invention may arrange | position these airflow generators A4 and A4 facing each other. In this case, unlike the other air flow generator A4, one of the air flow generators A4 has the first electrode 11 and the second electrode 12 so that the three-dimensional air flows W match. It is necessary to change the arrangement position in the front-rear direction.

  Further, in the present invention, the inclined surface forming the intersecting surface portion 24 of the airflow generator A3 shown in FIG. 8 may be formed by changing to a groove. At this time, the extending direction of the groove may be a circular arc or a straight line. FIG. 10 referred to here is a configuration explanatory diagram of a modified example of the airflow generator shown in FIG. 8. FIG. 11 is a schematic diagram showing a state in which the groove is seen from the XI direction of FIG.

  As shown in FIG. 10, the airflow generator A5 includes two reference surface portions 23a and a reference surface portion 23b, similarly to the airflow generator A3 shown in FIG. The first electrode pairs 1 and 1 disposed on the reference surface portions 23a and 23b respectively generate the first airflows 5 and 5 in the direction along the reference surface portions 23a and 23b.

  Unlike the airflow generator A3 shown in FIG. 8, the airflow generator A5 has grooves 13 instead of the intersecting surface portions 24. The groove 13 extends linearly, and the extending direction is inclined with respect to the extending direction of the first electrode pair 1.

  As shown in FIG. 11, the groove 13 is arranged between the reference surface portion 23a and the reference surface portion 23b, and a pair of second electrode pairs 2 are arranged in the groove 13 in the front-rear direction. Are arranged as follows. That is, the second electrode pair 2 is disposed at a twisted position with respect to the first electrode pair 1 as shown in FIG.

The first electrode 21 and the second electrode 22 of each second electrode pair 2 are arranged in the order of the second electrode 22 and the first electrode 21 from the front side to the rear side. That is, the second electrode pair 2 has an air flow that rotates about the extending direction of the groove 13 by the second air flow 6 that flows along the wall surface of the groove 13 that is the intersecting surface portion 24 from the rear side to the front side. 8 is generated.
Incidentally, in FIG. 10, reference numeral 6 represents a second air flow, reference numeral 8 represents a rotating air flow, and reference W represents a three-dimensional air flow including the rotating air flow.

  In such an air flow generator A5 shown in FIG. 10, since the three-dimensional air flow W given more directivity can be generated, the characteristics of the three-dimensional air flow W are finely controlled. be able to.

Further, in the air flow generator A5 shown in FIG. 10, the second electrode pair 2 (see FIG. 11) is the second electrode pair 2 (see FIG. 3B) in the air flow generator A1 shown in FIG. ), It is assumed that a step L (see FIG. 3B) is formed between the first electrode 21 and the second electrode 22, but in the second electrode pair 2, Only that step may be omitted. FIG. 12 referred to here is an operation explanatory diagram of a modified example of the airflow generation device shown in FIG. 10.
If there is no step L (see FIG. 3B) between the first electrode 21 and the second electrode 22 of the second electrode pair 2 shown in FIG. 11, as shown in FIG. The flow direction of the second air flow 6 generated by 2 is switched by switching the polarity of the AC power source 7 (see FIG. 2). That is, the air flow 6a is formed on the groove 13 so as to vibrate in the left-right direction in FIG.

  Further, in the air flow generator A2 shown in FIG. 6, the two electrode units 31 and 32 are adjacent to each other so that the two guide surface portions G and G form a V-shaped slope. The two electrode units 31 and 32 may be adjacent so that the surface portions G and G are aligned to form one inclined surface. In this case, the first electrode pair 1 and 1 face each other across the guide surface portions G and G.

In the embodiment, the first electrodes 11 and 21 in the first electrode pair 1 and the second electrode pair 2 are embedded in the dielectric D. However, in the present invention, the first electrodes 11 and 21 are It may be disposed on the dielectric D.
In the embodiment, the first electrode pair 1 and the second electrode pair 2 are individually connected to the power source. However, the first electrode pair 1 and the second electrode pair 2 are continuously formed. The power source may be connected to a power source through a common power supply line.

  In the above embodiment, the air flow generation device A1 applied to the automobile V has been described. However, the present invention is not limited to the vehicle quantity, but is an aircraft, a ship, and other equipment such as a turbine that is desired to improve aerodynamic characteristics. It may be applied to.

1 is a perspective view of an automobile in which an airflow generator according to an embodiment of the present invention is incorporated. It is a perspective view which shows typically a mode that the airflow generator which concerns on embodiment of this invention was seen from the direction II of FIG. (A) is IIIa-IIIa sectional drawing of FIG. 2, (b) is IIIb-IIIb sectional drawing of FIG. (A) thru | or (d) is process drawing which shows a mode that the flow of air generate | occur | produces with the electrode pair which comprises the airflow generator which concerns on embodiment of this invention. FIG. 5 is a perspective view schematically showing how an air flow is generated in the air flow generator according to the embodiment of the present invention. It is a perspective view which shows typically a mode that the flow of air generate | occur | produces with the airflow generator which concerns on embodiment of this invention. It is structure explanatory drawing of an airflow generation apparatus provided with two or more electrode units which have the 1st electrode pair arrange | positioned at a reference | standard surface part, and the 2nd electrode pair arrange | positioned at a crossing surface part. (A) And (b) is a structure explanatory drawing of the airflow generator which arrange | positioned more than one airflow generator provided with multiple electrode units. It is structure explanatory drawing of an airflow generation apparatus provided with a some reference | standard surface part. (A) is structure explanatory drawing of an airflow generator provided with two or more electrode units which have the 1st electrode pair arrange | positioned at a reference | standard surface part, and the 2nd electrode pair arrange | positioned at an intersection surface part, (b) ) Is an explanatory diagram of a configuration of an air flow generation device in which a plurality of air flow generation devices including a plurality of electrode units are further provided. FIG. 9 is a configuration explanatory diagram of a modified example of the airflow generation device illustrated in FIG. 8. It is a schematic diagram which shows a mode that the groove | channel was seen from the XI direction of FIG. It is action | operation explanatory drawing of the modification of the airflow generator shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st electrode pair 2 2nd electrode pair 3 Reference | standard surface part 5 1st air flow 6 2nd air flow 11 1st electrode 12 2nd electrode 21 1st electrode 22 2nd electrode 23a Reference | standard Surface part 23b Reference surface part 24 Crossing surface part 31 Electrode unit 32 Electrode unit 33 Electrode unit 34 Electrode unit A1 Airflow generator A2 Airflow generator A3 Airflow generator A4 Airflow generator A5 Airflow generator B Front bumper (object)
D dielectric G guide surface P discharge plasma S side surface (surface)

Claims (7)

An airflow generator having an electrode pair provided on the surface of an object and generating an airflow by generating plasma,
The electrode pair includes a first electrode pair that generates a first air flow along a reference surface portion of the surface portion;
A second electrode pair for generating a second air flow in a direction intersecting the direction along the reference surface portion of the surface portion;
An air flow generator characterized by comprising:   2. The air according to claim 1, wherein one electrode and the other electrode of the second electrode pair are arranged so as to be aligned along a direction in which the second air flow is generated. Flow generator.   3. The air flow generation device according to claim 1, wherein the second electrode pair is provided on a guide surface portion extending in a generation direction of the second air flow.   4. The airflow generation device according to claim 1, wherein the second electrode pair is provided at a twisted position with respect to the first electrode pair. 5. An airflow generator having an electrode pair provided on the surface of an object and generating an airflow by generating plasma,
The electrode pair includes a first electrode pair that generates a first air flow along a reference surface portion of the surface portion;
A second electrode pair for generating a second air flow in a direction intersecting the direction along the reference surface portion of the surface portion;
An electrode unit comprising:
An air flow generator comprising a plurality of the electrode units. The second electrode pair of the electrode unit is provided on a guide surface portion extending in a direction in which the second air flow is generated,
The air flow generator according to claim 5, wherein the adjacent electrode units are arranged so that their guide surface portions extend in a direction intersecting each other.   The airflow generation device according to claim 5 or 6, wherein the electrode unit is formed of a dielectric provided with the first electrode pair and the second electrode pair.

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