CN104948347B

CN104948347B - Thrust chamber collector with flow uniformizing function

Info

Publication number: CN104948347B
Application number: CN201410124535.XA
Authority: CN
Inventors: 周伟; 杨继东; 谢恒�; 王晓丽; 袁宇; 李晓旭; 宣智超; 卢明
Original assignee: Beijing Aerospace Propulsion Institute
Current assignee: Beijing Aerospace Propulsion Institute
Priority date: 2014-03-31
Filing date: 2014-03-31
Publication date: 2017-02-15
Anticipated expiration: 2034-03-31
Also published as: CN104948347A

Abstract

The invention relates to the liquid rocket propulsion technology, and particularly discloses a thrust chamber collector with a flow uniformizing function. A body shell is composed of an inner wall and an outer wall together. A cylinder formed when the inner wall is closed serves as a combustion chamber. An interlayer between the inner wall and the outer wall forms a cooling passageway. Annular grooves are formed in the inlet and the outlet of the cooling passageway. A bent pipe of the collector is welded and connected to the body shell at the annular groove in the inlet of the cooling passageway. A collector cavity is formed by the bent pipe and the body shell. The opening of the collector cavity is welded and connected to an inlet flange to form a collector inlet. Due to the double-collection-cavity structure, fluid is secondarily uniformized before entering the cooling passageway; by means of a horn-shaped expansion inlet with a reverse-Y-shaped diversion piece, fluid can more stably turn at the collector inlet, pressure fluctuation at the inlet and the two sides is reduced, local pressure loss can be reduced, and the diversion piece can play a role in reinforcing structure supporting.

Description

A kind of thrust chamber collector with flow equalizing function

Technical field

The invention belongs to liquid-propellant rocket engine designing technique is and in particular to a kind of collection of liquid rocket engine thrust chamber Clutch.

Background technology

Liquid rocket engine thrust chamber inner chamber is the combustion gas of high temperature, high pressure, in order to avoid locular wall occurs ablative degradation, It is provided with cooling jacket between inner and outer wall, introduce cryogen and locular wall is cooled down.The effect of inlet collector is exactly In every autonomous channel that the fluid distribution that engine general assembly Pipeline transport is come is distributed to cooling jacket complete cycle.In order to ensure The flow distribution of cooling duct is more uniform, to avoid combustion gas side wall temperature circumferential asymmetry even it is desirable to the pressure in collector exit Distribution is more uniform better.

As depicted in figs. 1 and 2, existing collector is designed with the circular single cavity structure of circular cross-section, collector Chamber 5 is directly connected with cooling duct 6 import, and pipe somewhere is arranged a suction flange 1 and is connected with general assembly pipeline, entrance no water conservancy diversion Device.This kind of collector structure has the following disadvantages：（1）The pressure reduction that fluid is formed along the flowing of collector chamber 5 ring directly contributes Collector outlet pressure is uneven；（2）The right-angle turning that intimate 90 degree of porch causes inlet region pressure distribution fluctuation more acute Strong.

Content of the invention

It is an object of the invention to provide a kind of outlet pressure uniformly, inlet fluid turn round more gentle, pressure oscillation and The less thrust chamber collector with flow equalizing function of local pressure loss.

Technical scheme is as follows：

A kind of thrust chamber collector with flow equalizing function, it includes columnar inwall, is located at the cylinder of inner wall outside The outer wall of shape, inwall closing forms combustion chamber, the space formation cooling duct between inner and outer wall, the side of the porch of outer wall Annular groove is circumferentially machined with wall, outside the described porch of outer wall, is fixed with annular distance seat, fixation outside described annular distance seat sets There is collector bend pipe；Described annular distance seat be disc, outside section be circular arc, inside section be shoulder structure, shoulder with Internal inner and outer wall is fixedly connected；Described annular distance seat be machined with several radial holes radially along complete cycle, each radial hole Run through inside and outside annular distance seat section；It is machined with arc opening, the outside of pipe is provided with method inside described collector bend pipe Blue；The section outer arc shape of described annular distance seat and the arc opening of above-mentioned collector bend pipe form complete circle；

In a kind of above-mentioned thrust chamber collector with flow equalizing function：The outside of described pipe processes one and enters Mouthful, porch is provided with expanding suction flange, and porch is fixed with " people " shape flow deflector simultaneously.

In a kind of above-mentioned thrust chamber collector with flow equalizing function：The aperture of each described radial hole is different.

In a kind of above-mentioned thrust chamber collector with flow equalizing function：The different form in the aperture of described radial hole For being respectively the minimum and maximum hole in aperture from two nearest and farthest radial holes of collector entrance, then dividing to entrance both sides Aperture diminishes radial hole not circumferentially successively.

The remarkable result of the present invention is：Due in collector bend pipe design and installation annular distance seat so that collector bend pipe Form outer set chamber between inwall and annular distance seat, formation interior set chamber between annular distance seat and burning chamber shell, double set cavity configurations, Fluid is made to realize secondary all flowing before entering cooling duct.

Externally the radial bore apertures between set chamber and interior set chamber are designed using not equal aperture, according to the ring in outer set chamber To pressure differential devise radial hole pore size so that the circumferential pressure difference adjustment in set chamber outward adapt to pore size so that Interior set cavity pressure before passage tends to uniform.

Collector elbow inlet, using the tubaeform expanded flange structure of band " people " shape flow deflector, makes collector porch flow Body turns round more gentle, reduces the pressure oscillation of entrance and two lateral areas, and can reduce local pressure loss；Other flow deflector is also The effect strengthening entrance structure inner chamber bearing capacity can be played.

Brief description

Fig. 1 is single-chamber collector structural front view in prior art；

Fig. 2 is the A-A sectional view of Fig. 1；

Fig. 3 is the thrust chamber collector structural representation with flow equalizing function；

Fig. 4 is the B-B sectional view of Fig. 3；

Fig. 5 is the stereochemical structure profile of the thrust chamber collector with flow equalizing function；

In figure：1. suction flange；2. collector bend pipe；3. inwall；4. outer wall；5. collector chamber；6. cooling duct；7. expand Open type suction flange；8. annular distance seat；9. outer set chamber；10. radial hole；Set chamber in 11.；12. flow deflectors；13. combustion chambers.

Specific embodiment

Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the present invention.

As shown in Figure 3 and Figure 4, the bend pipe that the pipe that described collector bend pipe 2 is circular for section surrounds, and bend pipe Inner side be machined with arc opening, the external circumferential optional position of pipe processes an entrance.In this porch, expanding is installed Suction flange 7, is welded and fixed " people " shape flow deflector 12 in porch simultaneously.

Annular distance seat 8 is welded on the arc opening of the inner side of pipe, described welding annular distance seat 8 is disc, its section Shape is as shown in figure 3, be circular arc outside section, it forms complete circle, in section with the section of above-mentioned collector bend pipe 2 Side is with shoulder structure, shoulder and internal inwall 3 and the fixing welding of outer wall 4.Annular distance seat 8 be machined with number radially along complete cycle Individual radial hole 10, in the present embodiment, the number of radial hole 10 is 36.Each radial hole 10 runs through inside and outside the two of annular distance seat 8 section Side.

So that interior set cavity pressure tends to uniform, the circumferential pressure difference in outer set chamber is adjusted, each radial hole 10 apertures are using the design of not equal aperture.As shown in figure 4, in the present embodiment, by two footpaths nearest and farthest from collector entrance It is respectively designed to the minimum and maximum hole in aperture to hole 10, then to entrance both sides radial hole 10 hole successively circumferentially respectively Footpath diminishes.

Compared with collector the same, the collector of the present invention also has closes, by inwall 3, the combustion chamber 13 being formed, and Outer wall 4 is installed, the space formation cooling duct 6 between inwall 3 and outer wall 4 outside inwall 3.The side wall of the porch of outer wall 4 On be circumferentially machined with annular groove.

The inner side of above-mentioned annular distance seat 8 is just welded at the annular groove of outer wall 4 porch, so just may be used from Fig. 3 and Fig. 4 Arrive, the cavity constituting between the inwall of collector bend pipe 2 and annular distance seat 8 is outer set chamber 9, and annular distance seat 8 and inwall 3 outer wall 4 Between the housing of combustion chamber 13 being collectively forming, i.e. space at the annular groove of outer wall 4 porch, define so-called interior set Chamber 11.From fig. 4, it can be seen that above-mentioned outer set chamber 9 and interior set chamber 11 are annular chamber, and set chamber 9 and Nei Ji outward The radial hole 10 passing through to process in chamber 11 is closed on annular space seat 8 communicate.

After fluid enters expanding suction flange 7, under the collective effect of expanding suction flange 7 and flow deflector 12, Smooth enters outer set chamber 9 along flow deflector 12 both sides so that the pressure at inlet fluctuation in collector bend pipe 2 is effectively pressed down System.In addition, when fluid enters into interior set chamber 11 from outer set chamber 9 by radial hole 10, radial hole 10 makes interior collector chamber Pressure distribution in 11 is optimized, larger in the position aperture low near entrance, static pressure, in the position high away from entrance, static pressure Put that aperture is less, thus making fluid gather the pressure reduction that in chamber 9, ring flowing is formed outside can be had after radial hole 10 Effect decay, then after interior set chamber 11 carries out secondary distribution, the pressure of cooling duct 6 entrance can be made to tend to uniform.

Claims

1. a kind of thrust chamber collector with flow equalizing function, it includes columnar inwall (3), is located at outside inwall (3) Columnar outer wall (4), inwall (3) closing forms combustion chamber (13), and the space between inwall (3) and outer wall (4) forms cooling Passage (6), the side wall of the porch of outer wall (4) is circumferentially machined with annular groove it is characterised in that：The entering of described outer wall (4) It is fixed with annular distance seat (8) outside at mouthful, outside described annular distance seat (8), be fixed with collector bend pipe (2)；Described annular distance seat (8) it is annular, for circular arc outside section, be shoulder structure, shoulder and internal inwall (3) and outer wall (4) inside section It is fixedly connected；Described annular distance seat (8) be machined with several radial holes (10) radially along complete cycle, each radial hole (10) runs through ring Inside and outside hole seat (8) section；It is machined with arc opening, the outside of pipe is provided with method inside described collector bend pipe (2) Blue；The section outer arc shape of described annular distance seat (8) forms complete circle with the arc opening of above-mentioned collector bend pipe (2) Shape.

2. as claimed in claim 1 a kind of thrust chamber collector with flow equalizing function it is characterised in that：Described pipe One entrance of outside processing, porch is provided with expanding suction flange (7), and porch is fixed with " people " shape flow deflector simultaneously (12).

3. as claimed in claim 1 a kind of thrust chamber collector with flow equalizing function it is characterised in that：Described several footpaths Different to each aperture of hole (10).

4. as claimed in claim 3 a kind of thrust chamber collector with flow equalizing function it is characterised in that：Described radial hole (10) the different form in aperture is, from two nearest and farthest radial holes (10) of collector entrance be respectively aperture maximum and Minimum hole, then to entrance both sides, radial hole (10) circumferentially diminishes in aperture successively respectively.