RU105684U1 - MIXING HEAD OF A LIQUID ROCKET ENGINE CAMERA - Google Patents

Abstract

 1. The mixing head of the chamber of a liquid rocket engine, including the outer, middle and inner (fire) bottoms, fastened together by two-component, one-component nozzles with pins, soldering and welding, while the two-component nozzles on the mixing head are located on several concentric circles, characterized in that part of two-component nozzles protrudes from the firing bottom, forming anti-pulsation partitions in the form of a ring with six diverging rays, dividing the transverse area of the combustion chamber seven identical acoustic cavities in area, while in the places where the radial rays intersect with three peripheral concentric circles, one-component fuel nozzles protruding from the fire bottom are also installed. ! 2. The mixing head according to claim 1, characterized in that the nozzles of the anti-pulsation partitions are made with their ends protruding into the fire chamber of the chamber by 2-5 steps between the nozzles. ! 3. The mixing head according to claim 1, characterized in that the ends of the nozzles pouring into the fire cavity are connected to each other by solder or welds.

Description

Technical field

The invention relates to the field of rocket technology, and more particularly to the mixing head of a liquid-propellant rocket engine chamber.

State of the art

The well-known mixing head of the RD-111 LPRE chamber (see the LPRE Design Album, part 3, compiled under the direction of V.P. Glushko, Military Publishing House of the USSR Ministry of Defense, M., 1969, p. 155, Fig. 379). We choose this mixing head as an analogue of a utility model. The mixing head contains the outer, middle and fire bottoms, which are fastened together by nozzles, pins, soldering and welding. The fuel and oxidizer nozzles are single-component and are staggered in the firing plate with a transition in the peripheral zone, heads are arranged in circles. On the periphery of the mixing head, pins are arranged evenly around the circumferences.

The disadvantage of the analogue is that it is possible in individual instances of cameras high-frequency instability of the working process.

The mixing head of the RD107 LRE chamber is known in the art (see. The LRE Design Album, compiled under the guidance of V.P. Glushko, Military Publishing House of the Ministry of Defense of the USSR. M, 1969, p. 36. Fig. 52). This mixing head is selected as a prototype of a utility model. The mixing head contains the outer, middle and inner bottoms, fastened together by nozzles, pins, soldering and welding. The fuel and oxidizer nozzles are made of two-component, evenly spaced along several concentric circles (including one in the center), single-component fuel nozzles are uniformly located behind these circles, and the pins are evenly located in the peripheral zone of the mixing head along two concentric circles.

The disadvantage of the prototype is that it is possible in individual copies of the cameras high-frequency instability of the working process, especially in conditions of forced modes.

Utility Model Disclosure

The objective of the proposed utility model is to create a mixing head of the engine chamber, providing high-frequency stability of the working process in the chamber in the forced mode.

This problem is solved due to the fact that in the mixing head of the chamber of a liquid propellant rocket engine, including the outer, middle and internal (fire) bottoms, fastened together by two-component, one-component nozzles, pins, soldering and welding, while the two-component nozzles on the head are arranged in several concentric circles, and part of the two-component nozzles protrudes from the firing bottom, forming anti-pulsation partitions in the form of a ring with six diverging rays, dividing the transverse area of the cam combustion measures into seven acoustic cavities of equal area, while at the intersection of radial rays with three peripheral concentric circles, one-component fuel nozzles protruding from the firing bottom are also installed.

In addition, the nozzles of the anti-pulsation partitions are made with their ends protruding into the fire chamber of the chamber by 2-5 steps between the nozzles.

The technical result from the use of a utility model is to ensure high-frequency stability of the workflow, especially in conditions of forced modes.

Brief Description of the Drawings

Figure 1 shows a fragment of the mixing head in section along the longitudinal axis.

Figure 2 shows a section aa section along the cavity of the fuel perpendicular to the longitudinal axis.

Figure 3 shows a section bB at the location of a single-component nozzle of a combustible peripheral row.

Figure 4 shows the view of the mixing head from the side of the firing bottom.

Utility Model Implementation Example

The mixing head (shown in Fig. 1) contains sections of the outer bottom 1, 2 and the middle bottom 3, which are hermetically fastened together and with the power ring 4 by welds 5, 6, and the inner (fire) bottom 7. The design of the mixing head contains two-component centrifugal nozzles 8, evenly spaced but concentric circles 9 (including one in the center), one-component centrifugal nozzles 10 (Fig.2, 3), evenly spaced around the circumference 11 (Fig.2). Part of the two-component nozzles made protruding nozzles 12, which are located on the circumference 13 and along the rays B (figure 4) from the specified circumference to the periphery of the camera. At the intersection of these rays with the circumference of the location of the single-component nozzles 10 and with the circumference of the pins 14, the protruding one-component nozzles 15. The protruding two-component 12 and the one-component nozzles 15 divide the working cavity into seven parts G (Figure 4). In addition, the nozzles of the anti-pulsation partitions are made with their ends protruding into the fire chamber of the chamber by 2-5 steps between the nozzles.

The two-component centrifugal nozzles 8 are identical in design and are made in the form of a one-piece part with two cavities: oxidizer 16 and fuel 17. The cavities 16 and 17 are aligned and are cylindrical chambers without nozzles at the outlet (open nozzles). The oxidizing agent enters the cavity 16 through four tangential openings 18 and then in the form of a spray cone, enters the cavity 17, where it is superimposed on a veil of fuel that has passed through three tangential openings 19.

The one-component fuel nozzles 10 (Fig. 3) of the peripheral row are made in the form of a cylindrical chamber 20 with a nozzle 21 at the outlet. Fuel enters the cylindrical chamber 20 of the peripheral nozzles 10 through three tangential openings 22. According to the external configuration, the one-component nozzles are close to two-component ones.

The nozzles 8, 10 along the outer surface 23 (see FIG. 3) are hermetically soldered with brazing material to flat bottoms: middle 3 and inner 7, forming together with the power ring 4 a fuel cavity 24 (see FIG. 1). On the periphery, the inner bottom 7 is supported by two rows of pins 14, on the part of which spacing sleeves 25 are installed (see FIG. 2), which regulate the size of the gap between the bottoms during assembly. The cavity of the oxidizer 26 is formed by a power ring 4, the middle bottom 3 and sections of the outer spherical bottom 1, 2. The oxidizer is supplied through a pipe with a flange 27 mounted in the center of the head. To increase the strength and rigidity of the head between the middle and outer bottoms, two annular partitions 28 with holes for the passage of the oxidizer are installed. In places of installation of partitions, the distance between adjacent rows of nozzles is increased.

Similarly, the protruding nozzles 12, 15 are soldered to the middle bottom 3 and the inner bottom 7. The nozzles 12 and 15 are centrifugal. The inlet holes of these nozzles 29, 30 are made tangential. Through them, the internal cavity of the nozzles of the fuel 31, 32 communicate with the cavity of the fuel 24 of the mixing head, and the internal cavity of the nozzles 33 - with the cavity of the oxidizer 26 of the mixing head. As can be seen from the drawing of FIG. 4, the protruding nozzles protrude into the fire chamber of the chamber behind the inner bottom 7 and form anti-pulsation partitions B. It can also be seen from the drawing of FIG. 4 that all nozzles and pins are located on concentric circles. The pins 14 are evenly spaced around the circles, and in places of intersection with the rays of the anti-pulsation partitions, instead of the pins 14, protruding fuel nozzles 15 are installed.

Device operation

Fuel and oxidizer through two-component nozzles 8 and one-component nozzles 10 enter the fire chamber of the engine chamber, where the process of mixture formation and combustion is carried out. The listed nozzles also include protruding nozzles 12 and 15. Protruding two-component nozzles 12 and fuel nozzles 15, arranged in the form of a concentric circle and six rays B from this circle to the fire wall of the chamber, divide the combustion zone into seven parts Г, thereby increasing the high-frequency workflow sustainability. The presence of baffles in the form of rays B, consisting of protruding two-component 12 and one-component, peripheral fuel nozzles 15 at the ends of the rays prevents the appearance of a tangential form of pressure pulsations in the volume of the combustion chamber.

Industrial applicability.

The proposed utility model can be used in the modernization of liquid rocket engines operating on liquid fuel components: oxygen and kerosene - and used on Soyuz-type launch vehicles.

Claims (3)

1. The mixing head of the chamber of a liquid rocket engine, including the outer, middle and inner (fire) bottoms, fastened together by two-component, one-component nozzles with pins, soldering and welding, while the two-component nozzles on the mixing head are located on several concentric circles, characterized in that part of two-component nozzles protrudes from the firing bottom, forming anti-pulsation partitions in the form of a ring with six diverging rays, dividing the transverse area of the combustion chamber seven identical acoustic cavities in area, while in the places where the radial rays intersect with three peripheral concentric circles, one-component fuel nozzles protruding from the fire bottom are also installed. 2. The mixing head according to claim 1, characterized in that the nozzles of the anti-pulsation partitions are made with their ends protruding into the fire chamber of the chamber by 2-5 steps between the nozzles. 3. The mixing head according to claim 1, characterized in that the ends of the nozzles pouring into the fire cavity are connected to each other by solder or welds.