CN115573815A - A heat exchange device using jet ejection of bleed air from aero-engine - Google Patents

Abstract

This application belongs to the technical field of heat exchanger design using bleed air jet ejection of aero-engine, and specifically relates to a heat exchange device using bleed air jet ejection of aero-engine. hole; the aeroengine bleed air pipe, whose outlet end passes through the through hole, and extends into the cold side outlet of the heat exchanger; the annular pipe is arranged in the cold side outlet of the heat exchanger, and its side wall has an inflow hole and It has a plurality of jet holes; the inflow hole communicates with the outlet end of the aero-engine bleed air pipe; each jet hole is distributed along the circumferential direction of the annular tube, facing the cold side outlet of the heat exchanger; the aero-engine bleed air pressure regulating valve is set on the aero-engine On the bleed air duct to maintain the stability of the airflow pressure in the bleed air duct of the aero-engine.

Description

A heat exchange device using jet ejection of bleed air from aero-engine

technical field

The application belongs to the technical field of design of a heat exchange device using bleed air jet ejection from an aero-engine, and in particular relates to a heat exchange device using bleed air jet ejection from an aero-engine.

Background technique

There are multiple heat exchange devices in the aero-engine, which use air to cool the heat flow, such as the lubricating oil cooler in the aero-engine. The cold-side air is jet-ejected. However, aero-engines have different working conditions. Under different working conditions, there are large differences in the pressure of the high-pressure airflow drawn from the aero-engine, which leads to large changes in the air flow of the cold side of the heat exchange device. The cooling effect of the heat flow fluctuates greatly, which is difficult to meet the application requirements.

In view of the existence of above-mentioned technical defect, propose this application.

It should be noted that the disclosure of the above background technical content is only used to assist in understanding the inventive concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of this patent application. When the filing date has been published, the above background technology should not be used to evaluate the novelty and inventiveness of the application.

Contents of the invention

The purpose of the present application is to provide a heat exchange device utilizing jet injection of bleed air from an aero-engine, so as to overcome or alleviate at least one known technical defect.

The technical scheme of the application is:

A heat exchange device utilizing jet ejection of bleed air from an aero-engine, comprising:

The heat exchanger has a through hole in the side wall at the outlet of the cold side;

The outlet end of the bleed air pipe of the aeroengine passes through the through hole and extends into the cold side outlet of the heat exchanger;

The annular pipe is arranged in the outlet part of the cold side of the heat exchanger, and its side wall has an inflow hole and a plurality of jet holes; the inflow hole communicates with the outlet end of the aeroengine bleed air pipe; each jet hole is distributed along the circumferential direction of the annular pipe, Outlet towards the cold side of the heat exchanger;

The aeroengine bleed air pressure regulating valve is arranged on the aeroengine bleed air pipeline to maintain the stability of the airflow pressure in the aeroengine bleed air pipeline.

According to at least one embodiment of the present application, in the above-mentioned heat exchange device using jet ejection of aero-engine bleed air, the annular tube is arranged coaxially with the outlet of the cold side of the heat exchanger, and its radial dimension is the outlet of the cold side of the heat exchanger 0.1-0.2 times the radial dimension of the site.

According to at least one embodiment of the present application, the above-mentioned heat exchange device utilizing jet injection of aeroengine bleed air further includes:

A plurality of jet nozzles, each jet nozzle is correspondingly arranged in a jet hole.

According to at least one embodiment of the present application, in the above-mentioned heat exchange device utilizing jet injection of bleed air from an aero-engine, each jet nozzle is in the configuration of a Lafal nozzle.

According to at least one embodiment of the present application, the above-mentioned heat exchange device utilizing jet injection of aeroengine bleed air further includes:

The aeroengine bleed air pressure gauge is arranged on the aeroengine bleed air pipeline and is located downstream of the aeroengine bleed air pressure regulating valve.

According to at least one embodiment of the present application, the above-mentioned heat exchange device utilizing jet injection of aeroengine bleed air further includes:

The aero-engine bleed air cut-off valve is arranged on the aero-engine bleed air pipeline and is located downstream of the pressure regulating valve.

According to at least one embodiment of the present application, in the above-mentioned heat exchange device utilizing bleed air jet ejection of an aero-engine, the side wall of the inlet part of the heat exchanger has perforations;

The side wall of the bleed air duct of the aero-engine has a bypass bleed hole, and the bypass bleed hole is located upstream of the bleed air pressure regulating valve of the aero-engine;

The heat exchange device utilizing jet ejection of aero-engine bleed air also includes:

The bypass air-introduction pipe, the inlet end of which is connected to the bypass air-induction hole, and the outlet end of which passes through the perforation and extends into the inlet part of the cold side of the heat exchanger;

The refrigeration turbine is arranged on the bypass bleed air pipe;

The bypass bleed air pressure gauge is arranged on the aeroengine bleed air pipeline and located upstream of the bypass bleed air hole;

The bypass bleed air cut-off valve is arranged on the bypass bleed air pipeline and located upstream of the refrigeration turbine;

The controller is connected with the bypass bleed air manometer and the bypass bleed air stop valve, and controls the bypass bleed air stop valve to open when the pressure signal transmitted by the bypass bleed air manometer is greater than a set threshold.

According to at least one embodiment of the present application, in the above-mentioned heat exchange device using jet injection of aero-engine bleed air, the side wall at the outlet end of the bypass bleed air duct has a plurality of jet holes; The pipes are distributed axially towards the cold side outlet of the heat exchanger.

According to at least one embodiment of the present application, the above-mentioned heat exchange device utilizing jet injection of aeroengine bleed air further includes:

The bypass bleed air thermometer is arranged on the bypass bleed air pipeline and is located downstream of the refrigeration turbine.

According to at least one embodiment of the present application, the above-mentioned heat exchange device utilizing jet injection of aeroengine bleed air further includes:

The exhaust pipe at the outlet of the cold side of the heat exchanger has a trumpet-shaped inlet end and communicates with the outlet of the cold side of the heat exchanger.

Description of drawings

Fig. 1 is a schematic diagram of a heat exchange device utilizing an aeroengine bleed air jet ejection provided by an embodiment of the present application;

in:

1-Heat exchanger; 2-Aero-engine bleed air pipe; 3-Ring pipe; 4-Aero-engine bleed air pressure regulator; 5-Jet nozzle; 6-Aero-engine bleed air pressure gauge; 7-Aero-engine bleed air Stop valve; 8-Bypass bleed air pipeline; 9-Refrigeration turbine; 10-Bypass bleed air pressure gauge; 11-Bypass bleed air stop valve; 12-Controller; 13-Bypass bleed air thermometer; 14-Exhaust pipe for the outlet of the cold side of the heat exchanger.

In order to better illustrate this embodiment, some parts in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only for illustrative purposes and should not be construed as limitations on this patent.

detailed description

In order to make the technical solution of the present application and its advantages clearer, the technical solution of the present application will be further clearly and completely described in detail below in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only part of the application Examples are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, and other relevant parts can refer to the general design. In the case of no conflict, the embodiments in the application and the technologies in the embodiments Features can be combined with each other to obtain new embodiments.

In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the application shall have the usual meanings understood by those skilled in the art to which the application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer" used in the description of this application are used only To indicate relative orientation or positional relationship, not to imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the described object changes, its relative positional relationship may also change accordingly , and therefore cannot be construed as limiting the application. The terms "first", "second", "third" and similar terms used in the description of this application are used for descriptive purposes only to distinguish different components, and should not be understood as indicating or implying relative importance. Words such as "a", "an" or "the" used in the description of the present application should not be understood as an absolute limitation on the number, but should be understood as there is at least one. The words "comprising" or "comprising" and other similar words used in the description of the present application mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

In addition, it should be noted that, unless otherwise specified and limited, words such as "installation", "connection" and "connection" used in the description of this application should be interpreted in a broad sense, for example, the connection can be a fixed The connection can also be detachable or integrated; it can be mechanical or electrical; it can be direct or indirect through an intermediary; it can also be the internal communication of two components. A skilled person can understand its specific meaning in this application according to specific circumstances.

The present application will be described in further detail below in conjunction with accompanying drawing 1 .

A heat exchange device utilizing jet ejection of bleed air from an aero-engine, comprising:

The heat exchanger 1 has a through hole in the side wall at the outlet of the cold side;

The aeroengine bleed air duct 2, the outlet end of which passes through the through hole and extends into the cold side outlet of the heat exchanger 1;

The annular tube 3 is arranged in the outlet of the cold side of the heat exchanger 1, and its side wall has an inflow hole and a plurality of jet holes; the inflow hole communicates with the outlet end of the aeroengine bleed air duct 2; Circumferentially distributed, towards the cold side outlet of the heat exchanger 1;

The aeroengine bleed air pressure regulating valve 4 is arranged on the aeroengine bleed air pipeline 2 to maintain the stability of the airflow pressure in the aeroengine bleed air pipeline 2 .

For the heat exchange device disclosed in the above embodiment using the jet ejection of aero-engine bleed air, those skilled in the art can understand that the aero-engine bleed air pipeline 2 can be connected to the aero-engine, and the high-pressure airflow can be drawn from the aero-engine. The air flow flows into the annular pipe 3 through the bleed air duct 2 of the aero-engine, and then sprays into the cold side outlet of the heat exchanger 1 through each jet hole, and jets toward the cold side outlet of the heat exchanger 1, thereby realizing the cooling of the heat exchanger 1 The ejection of the air on the cold side ensures the flow of the air on the cold side of the heat exchanger 1 .

For the heat exchange device disclosed in the above embodiment that utilizes the jet injection of aero-engine bleed air, those skilled in the art can also understand that the jet holes are designed to be distributed along the circumferential direction of the annular tube 3, that is, at the center of the heat exchanger 1. The outlet part of the cold side is distributed along the circumferential direction, and the energy can be efficiently transferred to the cold side air of the heat exchanger 1 through the boundary mixing effect, thereby enhancing the ejection effect of the cold side air of the heat exchanger 1 and ensuring that the heat exchanger 1 Flow of cold side air.

For the heat exchange device disclosed in the above-mentioned embodiment utilizing the jet ejection of aero-engine bleed air, those skilled in the art can also understand that the aero-engine bleed air pressure regulating valve 4 is set on the aero-engine bleed air pipeline 2, which can Configure the aero-engine bleed air pressure regulating valve 4 according to the actual situation, so that the airflow pressure in the aero-engine bleed air duct 2 is stabilized at the desired value, so as to control the pressure of the aero-engine's high-pressure airflow, so that the air flow at the cold side of the heat exchanger 1 is stable , to ensure the stability of the heat flow cooling effect.

In some optional embodiments, in the above-mentioned heat exchange device using jet injection of aero-engine bleed air, the annular tube 3 is arranged coaxially with the outlet of the cold side of the heat exchanger 1, and its radial dimension is 0.1-0.2 times the radial dimension of the outlet of the cold side, so as to be close to the center of the outlet of the cold side of the heat exchanger 1 and away from the side wall of the outlet of the cold side of the heat exchanger 1, so as to ensure the introduction of air to the cold side of the heat exchanger 1 Radiation effect, and can reduce the flow resistance of the air on the cold side of the heat exchanger 1.

In some optional embodiments, in the above-mentioned heat exchange device using jet injection of aero-engine bleed air, the cross section of the annular tube 3 is streamlined, specifically, it can be airfoil-shaped, so as to reduce the impact on the heat exchanger 1. Flow resistance of cold side air.

In some optional embodiments, the above-mentioned heat exchange device using jet injection of aero-engine bleed air also includes:

A plurality of jet nozzles 5, each jet nozzle 5 is correspondingly arranged in a jet hole.

In some optional embodiments, in the above-mentioned heat exchange device that utilizes jet injection of aero-engine bleed air, each jet nozzle 5 is a Rafal nozzle configuration, that is, the radial dimension of the inlet end of each jet nozzle 5 shrinks gradually , the size of the outlet end gradually expands, and the high-pressure airflow flowing into the annular pipe 3 through the aeroengine bleed air duct 2 can be sprayed into the cold side outlet of the heat exchanger 1 through each jet nozzle 5 at a higher speed, thereby improving The ejection effect on the cold side air of the heat exchanger 1, and based on the throttling effect, restrict the flow rate of the high-pressure airflow drawn from the aero-engine, thereby reducing the consumption of the high-pressure airflow drawn from the aero-engine.

In some optional embodiments, the above-mentioned heat exchange device using jet injection of aero-engine bleed air also includes:

The aeroengine bleed air pressure gauge 6 is arranged on the aeroengine bleed air pipeline 2 and is located downstream of the aeroengine bleed air pressure regulating valve 4 .

In some optional embodiments, the above-mentioned heat exchange device using jet injection of aero-engine bleed air also includes:

The aeroengine bleed air cut-off valve 7 is arranged on the aeroengine bleed air pipeline 2 and is located downstream of the pressure regulating valve 4 .

In some optional embodiments, in the above-mentioned heat exchange device using bleed air jet ejection from aero-engines, the side wall at the inlet of the heat exchanger 1 has perforations;

The side wall of the bleed air duct 2 of the aero-engine has a bypass bleed hole, and the bypass bleed hole is located upstream of the bleed air pressure regulating valve 4 of the aero-engine;

The heat exchange device utilizing jet ejection of aero-engine bleed air also includes:

The bypass air-inducing pipeline 8, its inlet end is connected to the bypass air-inducing hole, and its outlet end extends into the cold side inlet part of the heat exchanger 1 through the perforation;

Refrigeration turbine 9 is arranged on the bypass bleed air pipeline 8;

The bypass bleed air pressure gauge 10 is arranged on the aeroengine bleed air pipeline 2 and is located upstream of the bypass bleed air hole;

The bypass bleed air cut-off valve 11 is arranged on the bypass bleed air pipeline 8 and is located upstream of the refrigeration turbine 9;

The controller 12 is connected to the bypass bleed air manometer 10 and the bypass bleed air shut-off valve 11, and controls the bypass bleed air shut-off valve 11 to open when the pressure signal transmitted by the bypass bleed air manometer 10 is greater than the set threshold .

For the heat exchange device disclosed in the foregoing embodiments utilizing the jet injection of the aero-engine bleed air, those skilled in the art can understand that it is designed to monitor the pressure of the high-pressure air flow drawn from the aero-engine with a bypass bleed air manometer 10, When the pressure exceeds the set threshold, the controller 12 controls the bypass bleed air cut-off valve 11 to open, at this time, part of the high-pressure air flow drawn from the aeroengine can flow into the heat exchanger 1 through the bypass bleed air pipeline 8 In the cold side inlet of the heat exchanger 1, this part of the high-pressure airflow will be cooled when it flows through the refrigeration turbine 9, and will be mixed with the air at the cold side inlet of the heat exchanger 1 when it flows into the cold side inlet of the heat exchanger 1, so that It is possible to increase the cold-side air flow of the heat exchanger 1 to ensure the cooling effect on the heat flow, that is, when the pressure of the high-pressure air flow drawn from the aero-engine is too high, the refrigeration turbine 9 is used to cool part of the high-pressure air flow, and this part The cooled high-pressure airflow is used as part of the air flow at the cold side of the heat exchanger 1 to cool the heat flow. Since this part of the high-pressure airflow has a relatively high pressure, it will be efficiently cooled when passing through the refrigeration turbine 9, and can usually be cooled Below 40°C, so that the heat exchanger 1 has a higher cooling capacity and its effect.

In some optional embodiments, in the above-mentioned heat exchange device using jet injection of aero-engine bleed air, the side wall of the outlet end of bypass bleed air duct 8 has a plurality of jet holes; The air pipe 8 is axially distributed, towards the outlet of the cold side of the heat exchanger 1, and the high-pressure airflow flowing into the bypass bleed air pipe 8 can be sprayed into the inlet of the cold side of the heat exchanger 1 through each jet hole. The air in the inlet portion of the cold side of the heat exchanger 1 is efficiently mixed to ensure the cooling effect of the heat exchanger 1 .

In some optional embodiments, the above-mentioned heat exchange device using jet injection of aero-engine bleed air also includes:

The bypass bleed air thermometer 13 is arranged on the bypass bleed air pipeline 8 and is located downstream of the refrigeration turbine 9 .

In some optional embodiments, the above-mentioned heat exchange device using jet injection of aero-engine bleed air also includes:

The exhaust pipe 14 at the outlet of the cold side of the heat exchanger is trumpet-shaped at its inlet and communicates with the outlet of the cold side of the heat exchanger 1 to accelerate the discharge of the air flowing out of the outlet of the cold side of the heat exchanger 1 .

Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings, and those skilled in the art should understand that the protection scope of the present application is obviously not limited to these specific embodiments, without departing from the principle of the application Those skilled in the art can make equivalent changes or substitutions to the relevant technical features under the premise of the above-mentioned conditions, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.

Claims (10)

1. A heat exchange device utilizing an aero-engine bleed air jet ejection, characterized in that it comprises: The heat exchanger (1), the side wall of the outlet part of the cold side has a through hole; The outlet end of the aeroengine bleed air duct (2) passes through the through hole and extends into the cold edge outlet part of the heat exchanger (1); An annular pipe (3) is arranged in the outlet of the cold side of the heat exchanger (1), and its side wall has an inflow hole and a plurality of jet holes; the inflow hole and the aeroengine bleed air duct (2) The outlet end of the outlet port is connected; each of the jet holes is distributed along the circumferential direction of the annular pipe (3), towards the cold edge outlet of the heat exchanger (1); The aero-engine bleed air pressure regulating valve (4) is arranged on the aero-engine bleed air pipeline (2), so as to maintain the stability of the airflow pressure in the aero-engine bleed air pipeline (2). 2. The heat exchange device utilizing the jet ejection of aero-engine bleed air according to claim 1, characterized in that, The annular pipe (3) is arranged coaxially with the outlet of the cold side of the heat exchanger (1), and its radial dimension is 0.1-0.2 times the radial dimension of the outlet of the cold side of the heat exchanger (1). 3. The heat exchange device utilizing the jet ejection of aero-engine bleed air according to claim 1, characterized in that, Also includes: A plurality of jet nozzles (5), each of the injection nozzles (5) is correspondingly arranged in one of the jet holes. 4. The heat exchange device utilizing the jet ejection of aero-engine bleed air according to claim 3, characterized in that, Each of the jet nozzles (5) is a Rafal nozzle configuration. 5. The heat exchange device utilizing the jet ejection of aero-engine bleed air according to claim 1, characterized in that, Also includes: The aeroengine bleed air pressure gauge (6) is arranged on the aeroengine bleed air pipeline (2) and is located downstream of the aeroengine bleed air pressure regulating valve (4). 6. The heat exchange device utilizing the jet ejection of aero-engine bleed air according to claim 1, characterized in that, Also includes: The aero-engine bleed air cut-off valve (7) is arranged on the aero-engine bleed air pipeline (2) and is located downstream of the pressure regulating valve (4). 7. The heat exchange device utilizing aero-engine bleed air jet ejection according to claim 1, characterized in that, The side wall of the inlet of the heat exchanger (1) has perforations; The side wall of the aero-engine bleed air duct (2) has a bypass bleed hole, and the bypass bleed hole is located upstream of the aero-engine bleed air pressure regulating valve (4); The heat exchange device utilizing jet ejection of bleed air from an aero-engine also includes: A bypass air-inducing pipe (8), the inlet end of which communicates with the bypass air-inducing hole, and its outlet end extends through the perforation into the cold side inlet of the heat exchanger (1); Refrigeration turbine (9), arranged on the bypass bleed air pipeline (8); A bypass bleed air pressure gauge (10), arranged on the aeroengine bleed air pipeline (2), is located upstream of the bypass bleed air hole; A bypass bleed air cut-off valve (11), arranged on the bypass bleed air pipeline (8), is located upstream of the refrigeration turbine (9); A controller (12), connected to the bypass bleed air pressure gauge (10) and the bypass bleed air shut-off valve (11), the pressure signal transmitted by the bypass bleed air pressure gauge (10) is greater than the set When the threshold value is reached, the bypass bleed air cut-off valve (11) is controlled to open. 8. The heat exchange device utilizing aero-engine bleed air jet ejection according to claim 7, characterized in that, The side wall of the outlet end of the bypass bleed air pipe (8) has a plurality of jet holes; Cold side exit. 9. The heat exchange device utilizing aero-engine bleed air jet ejection according to claim 7, characterized in that, Also includes: The bypass bleed air thermometer (13) is arranged on the bypass bleed air pipeline (8) and is located downstream of the refrigeration turbine (9). 10. The heat exchange device utilizing aero-engine bleed air jet ejection according to claim 7, characterized in that, Also includes: The exhaust pipe (14) at the outlet of the cold side of the heat exchanger has a trumpet-shaped inlet end and communicates with the outlet of the cold side of the heat exchanger (1).

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