CN117703625A - Gas generator structure - Google Patents
Gas generator structure Download PDFInfo
- Publication number
- CN117703625A CN117703625A CN202311837916.8A CN202311837916A CN117703625A CN 117703625 A CN117703625 A CN 117703625A CN 202311837916 A CN202311837916 A CN 202311837916A CN 117703625 A CN117703625 A CN 117703625A
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- Prior art keywords
- cavity ring
- injection unit
- gas generator
- ring
- generator structure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000000446 fuel Substances 0.000 claims abstract description 16
- 239000007800 oxidant agent Substances 0.000 claims abstract description 13
- 230000001590 oxidative effect Effects 0.000 claims abstract description 13
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 12
- 208000002925 dental caries Diseases 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 34
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 230000002401 inhibitory effect Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Fuel Cell (AREA)
Abstract
The application discloses gas generator structure relates to gas generator structure field, including head, body, the one end of body is connected to the head, and the head includes shell, injection unit, a end and two ends, and a end and two ends separate the head into two oxidant chamber and fuel chamber that are not intercommunicated, and injection unit passes a end and two ends and is connected with a end and two ends to make the methane in the fuel chamber and the liquid oxygen in the oxidant chamber get into inside the body through the injection unit, the injection unit includes coaxial direct current injection unit and coaxial centrifugal injection unit. The body is provided with two acoustic cavity rings. From the injector and the design of body structure, the problem of the combustion stability of the gas generator is solved.
Description
Technical Field
The invention relates to a gas generator structure suitable for a liquid rocket engine, which can effectively avoid unstable combustion of the gas generator and can be used in the technical fields of aerospace and the like.
Background
The gas generator is a key component of the rocket engine, and has the function of mixing the propellant in a proper proportion and then spraying the mixture into a combustion chamber for combustion, and the generated high-temperature gas drives a turbine pump to do work. In order to achieve better uniformity of gas temperature, the injector of the gas generator generally adopts the mode that all nozzle structures are the same, so that the combustion heat release of the gas generator is concentrated, and unstable combustion is easy to generate. When unstable combustion is generated in the combustion chamber, the combustion chamber can burn through instantly or cause great vibration, so that mechanical damage of the engine is caused, and the task fails.
Disclosure of Invention
The technical problem that this application solved is: overcomes the defects of the prior art, provides a gas generator structure and solves the problem of the combustion stability of the gas generator.
Specifically, the injector adopts an energy release partition, and the body is provided with a design scheme of an acoustic cavity ring, so that the combustion stability of the gas generator is improved.
The technical scheme provided by the application is as follows:
the utility model provides a gasifier structure, including head, body, the one end of head connection to body, the head includes shell, a end, two ends and injection unit, a end is connected in the shell inside, two ends are connected in the one end of casing, divide into two oxidant chamber and the fuel chamber that are not mutually connected with the shell in, the injection unit passes a end and two ends and is connected with a end and two ends to make fuel in the fuel chamber and the liquid oxygen in the oxidant chamber get into inside the body through the injection unit, the injection unit includes coaxial direct current injection unit and coaxial centrifugal injection unit.
And a plurality of round holes which are in one-to-one correspondence are formed in the first bottom and the second bottom, the round holes are arranged according to concentric circles, the round holes of the innermost ring and the outermost ring are provided with coaxial direct current injection units, and the round holes of the other rings are provided with coaxial centrifugal injection units.
And a side region air film cooling injection fan-shaped hole is formed in one bottom, and the side region air film cooling injection fan-shaped hole is positioned at the outer side of the round hole of the outermost ring.
The inner arc length L of the side region air film cooling injection fan-shaped hole meets the following relation: l is more than 1.1 and less than or equal to 1.5R, wherein R is the outlet diameter of the coaxial direct current injection unit.
The top position cover of body portion outer wall is equipped with first sound cavity ring, and a plurality of cavitys have been seted up to the inboard of first sound cavity ring, and the multiunit aperture has been seted up to the position that the body portion just is to first sound cavity ring, and aperture intercommunication cavity and the inside of body portion.
Each group of small holes comprises two small holes, the apertures of the two small holes are the same, the number of the small holes is the same as that of the cavities on the first acoustic cavity ring, and each cavity is opposite to one group of small holes.
The outer wall of the body is also provided with a second sound cavity ring, and the second sound cavity ring is positioned at one side of the first sound cavity ring, which is away from the head; the position of the body part facing the second sound cavity ring is provided with a plurality of groups of small holes, and each group of small holes is communicated with the cavity and the inside of the body part.
The distance L0 between the middle part of the first acoustic cavity ring and a bottom satisfies the following relationship: 0.5d 1 ≤L 0 ≤2d 1 Wherein d is 1 Is A-diameter of the aperture facing the first acoustic cavity ring on section a;
the distance L1 between the middle part of the second sound cavity ring and the bottom and a certain n-order longitudinal vibration mode to be restrained meet the following relation: l1=l3/n, where L3 is the distance of the body outlet from a base, n=1, 2,3; the middle part of the second sound cavity ring is aligned with the B-B section.
The first sound cavity ring, the second sound cavity ring and the body are all welded and connected.
The technical solution of the invention is as follows: the gas generator is formed by welding a head part and a body part. The head injector adopts a multi-circle nozzle concentric circle arrangement, adopts an energy release partition scheme, adopts a coaxial direct current scheme for the innermost ring and the outermost ring, adopts a coaxial centrifugal scheme for the rest of nozzles, realizes different injection speeds by reasonably designing the sizes of the nozzles, disperses a combustion heat release plane, and realizes the wrong frequency of combustion frequency and combustion chamber acoustic frequency. The outermost side of the injector is provided with the air film fan-shaped holes with the same number as the air film fan-shaped holes of the outermost ring of the nozzles, thereby providing more favorable conditions for the thermal protection of the body. The body part adopts a single-wall uncooled structure, two acoustic cavity rings are arranged on the body part, an acoustic cavity ring is arranged at the position, close to the head, of the upstream of the body part, and a plurality of acoustic cavities for inhibiting transverse vibration mode are arranged in the acoustic cavity ring; an acoustic cavity ring is arranged at the lower part of the body part, and a plurality of acoustic cavities for inhibiting axial vibration mode are arranged in the acoustic cavity ring. In order to make the temperature in the acoustic cavity more uniform, each acoustic cavity corresponds to a plurality of round inlet holes, and the frequency of the acoustic cavity is changed by adjusting the number of the inlet holes of the acoustic cavity and the size in the cavity.
In summary, the present application at least includes the following beneficial technical effects:
compared with the prior art, the invention has the advantages that: this patent has designed a energy subregion release's injector, adopts the concentric circle arrangement of multiturn nozzle, and the nozzle of the inner circle and the outer lane adopts coaxial direct current scheme, and other nozzles are coaxial centrifugal scheme, realizes different injection speeds through reasonable design nozzle size, makes the burning release plane disperse, realizes that burning frequency and combustor acoustic frequency are wrong frequently. The body part adopts a single-wall uncooled structure. Two acoustic cavity rings are arranged on the body, one acoustic cavity ring is arranged at the position, close to the head, of the upstream of the body, and a plurality of acoustic cavities for inhibiting transverse vibration mode are arranged in the acoustic cavity ring; an acoustic cavity ring is arranged at the lower part of the body part, and a plurality of acoustic cavities for inhibiting axial vibration mode are arranged in the acoustic cavity ring. The sound cavity is provided with a plurality of inlet holes, so that the temperature of fuel gas in the sound cavity is more uniform, and the frequency control of the sound cavity is more accurate.
Drawings
FIG. 1a is a schematic view of a gas generator according to the present invention, and FIG. 1b is a cross-sectional view of FIG. 1 a;
FIG. 2 is a schematic diagram of an injector nozzle arrangement;
FIG. 3 is a schematic diagram of a coaxial DC injection unit;
FIG. 4 is a schematic illustration of a coaxial centrifugal injection unit;
FIG. 5 is a schematic view of a body assembly;
FIG. 6 is a schematic view of a body structure;
fig. 7 is a schematic view of the acoustic cavity ring structure.
Reference numerals illustrate: 1. a head; 2. a body assembly; 3. a coaxial direct current injection unit; 4. a coaxial centrifugal injection unit; 5. side region air film cooling injection holes; 6. a direct current oxygen nozzle; 7. a first coaxial direct current methane nozzle; 8. a centrifugal oxygen nozzle; 9. a second in-line direct current methane nozzle; 10. two bottoms; 11. a bottom; 12. a body part; 13. a first acoustic cavity ring; 14. a second acoustic cavity ring; 16. an oxidant chamber; 17. a fuel chamber.
Detailed Description
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The embodiment of the application discloses a gas generator structure, as shown in fig. 1a and 1b, which comprises a head part 1 and a body part assembly 2. The body assembly 2 comprises a body 12, a first acoustic cavity ring 13 and a second acoustic cavity ring 14. The first acoustic cavity ring 13 and the second acoustic cavity ring 14 are respectively provided at different positions on the outside axis of the body 12.
The head part 1 is connected to one end of the body part 12, the head part 1 comprises a shell, a bottom 11 and two bottoms 10, the bottom 11 is connected to the inside of the shell, the two bottoms 10 are connected to one end of the shell, the inside of the shell is divided into two oxidant cavities 16 and a fuel cavity 17 which are not communicated with each other, the fuel cavity 17 is formed between the bottom 11 and the two bottoms 10, and the oxidant cavity 16 is formed between the two bottoms 10 and the top of the shell; the head 1 is provided with a liquid oxygen inlet in communication with the oxidant chamber 16 for feeding liquid oxygen into the oxidant chamber 16 and a methane inlet in communication with the fuel chamber 17 for feeding methane into the fuel chamber 17. The injection unit passes through the first and second bottoms 11 and 10 and is connected to the first and second bottoms 11 and 10 so that liquid oxygen in the fuel and oxidant chambers 16 in the methane chamber 17 passes through the injection unit into the interior of the body 2.
As shown in fig. 2, the injection unit includes a coaxial direct current injection unit 3 and a coaxial centrifugal injection unit 4. A plurality of round holes which are in one-to-one correspondence are drilled on the first bottom 11 and the second bottom 10, the plurality of round holes are arranged according to concentric circles, the first circle of round holes and the round holes of the outermost circle are provided with coaxial direct current injection units 3, and the round holes of the other circles are provided with coaxial centrifugal injection units 4; and arranging side region air film cooling injection fan-shaped holes 5 on the outermost ring of the injection surface. The number of the air film cooling and injecting fan-shaped holes 5 is the same as the number of the nozzles at the outermost ring, and the inner arc length L of the air film cooling and injecting fan-shaped holes 5 at the side area meets the following relationship: l is more than 1.1 and less than or equal to 1.5R, wherein R is the outlet diameter of the first coaxial direct current methane nozzle 7 at the outermost ring. The air film cooling injection fan-shaped holes 5 are arranged, so that fuel (methane) is sprayed out of the air film cooling injection fan-shaped holes 5 to form an air film, and liquid oxygen sprayed out of the injection unit is prevented from being sprayed onto the inner wall of the body 2.
As shown in fig. 3, the coaxial direct current injection unit 3 includes a direct current oxygen nozzle 6 and a first coaxial direct current methane nozzle 7, the first coaxial direct current methane nozzle 7 passes through circular holes on a first bottom 11 and a second bottom 10 and is fixedly connected with the first bottom 11 and the second bottom 10, the first coaxial direct current methane nozzle 7 includes a first cavity and a second cavity with different inner diameters, the second cavity is located at one side of the first cavity far away from the second bottom 10, the direct current oxygen nozzle 6 is inserted into the first coaxial direct current methane nozzle 7, a first through hole penetrating to two ends of the direct current oxygen nozzle 6 is formed in the direct current oxygen nozzle 6, the direct current oxygen nozzle 6 includes a first connecting part and a second connecting part with different outer diameters, the first connecting part is located in the first cavity and is matched with the first coaxial direct current methane nozzle 7, the second connecting part is located in the second cavity, the outer diameter of the second connecting part is smaller than the aperture of the second cavity to form a circular cavity, a plurality of inflow holes distributed along the radial directions are formed in the first coaxial direct current methane nozzle 7, and two ends of the inflow holes are respectively communicated with the fuel cavity 17 and the circular cavity.
As shown in fig. 4, the coaxial centrifugal injection unit 4 includes a centrifugal oxygen nozzle 8 and a second coaxial direct current methane nozzle 9, and the second coaxial direct current methane nozzle 9 has the same structure as the first coaxial direct current methane nozzle 7, except that: the centrifugal oxygen nozzle 8 is provided with a second through hole, and the second through hole penetrates through one end of the centrifugal oxygen nozzle 8 extending out of a bottom 11; one end of the centrifugal oxygen nozzle 8 extends out of the two bottoms 10, and the centrifugal oxygen nozzle 8 is provided with a plurality of tangential holes which are communicated with the oxidant cavity 16 and the second through holes. The liquid oxygen flows into the second through hole through the tangential hole, and finally the fluid sprayed out of the second through hole is in a conical diffusion shape.
As shown in fig. 5 and 6, the first acoustic cavity ring 13 is connected to the top portion of the outer wall of the body 12, and the second acoustic cavity ring 14 is connected to the middle portion of the outer side of the body 12. The inner diameter d3 of the first acoustic cavity ring 13 and the second acoustic cavity ring 14 is the same as the diameter d0 of the cylindrical section of the body 12, and a plurality of cavities are uniformly arranged on the inner sides of the first acoustic cavity ring 13 and the second acoustic cavity ring 14, and the outer diameter of each cavity is d4, as shown in fig. 7. A plurality of groups of small holes are respectively drilled on the section A-A and the section B-B of the body 12, each group is provided with two small holes, and the diameters of the two small holes are the same. The number of the punching groups of the body 12 is the same as that of the cavities on the acoustic cavity ring, and each cavity is opposite to a group of small holes which are communicated with the cavities and the inside of the body 12.
The first acoustic cavity ring 13, the second acoustic cavity ring 14 are connected with the body 12 by argon arc welding, each cavity in the acoustic cavity ring corresponds to a hole in the body, the cavity in the acoustic cavity ring corresponds to a small hole in the acoustic cavity ring in a quadrant alignment mode, and fuel gas is ensured to be communicated with the cavity in the acoustic cavity ring through the small hole in the body. The first acoustic cavity ring 13 is for suppressing transverse vibration mode, the distance L of the cross section A-A from a base 11 0 The following relationship is satisfied: 0.5d 1 ≤L 0 ≤2d 1 The method comprises the steps of carrying out a first treatment on the surface of the The acoustic cavity ring 2 is used for suppressing longitudinal vibration mode, and the distance L1 of the section B-B from a bottom 11 and the required suppressionSome n-order longitudinal modes satisfy the following relation: l1=l3/n, where L3 is the distance of the body outlet from a bottom 11, n=1, 2,3.
The foregoing detailed description has been provided for the purposes of illustration in connection with specific embodiments and exemplary examples, but such description is not to be construed as limiting the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications and improvements may be made to the technical solution of the present application and its embodiments without departing from the spirit and scope of the present application, and these all fall within the scope of the present application. The scope of the application is defined by the appended claims.
What is not described in detail in the present specification is a well known technology to those skilled in the art.
Claims (9)
1. A gas generator structure, characterized in that: the device comprises a head part (1) and a body part (12), wherein the head part (1) is connected to one end of the body part (12), the head part (1) comprises a shell, a bottom (11), two bottoms (10) and an injection unit, the bottom (11) is connected to the inside of the shell, the two bottoms (10) are connected to one end of the shell, the inside of the shell is divided into two oxidant cavities (16) and a fuel cavity (17) which are not communicated with each other, the injection unit penetrates the bottom (11) and the two bottoms (10) and is connected with the bottom (11) and the two bottoms (10), so that fuel in the fuel cavity (17) and liquid oxygen in the oxidant cavity (16) enter the inside of the body part (12) through the injection unit, and the injection unit comprises a coaxial direct current injection unit (3) and a coaxial centrifugal injection unit (4).
2. A gas generator structure as claimed in claim 1, wherein: a plurality of round holes corresponding to one another are formed in the first bottom (11) and the second bottom (10), the round holes are arranged in a concentric circle mode, the coaxial direct current injection unit (3) is arranged in the round holes of the innermost ring and the outermost ring, and the coaxial centrifugal injection units (4) are arranged in the round holes of the other rings.
3. A gas generator structure as claimed in claim 2, wherein: and a side region air film cooling injection fan-shaped hole (5) is formed in the bottom (11), and the side region air film cooling injection fan-shaped hole (5) is positioned outside the round hole of the outermost ring.
4. A gas generator structure as claimed in claim 3, wherein: the inner arc length L of the side region air film cooling injection fan-shaped hole (5) meets the following relation: l is more than 1.1 and less than or equal to 1.5R, wherein R is the outlet diameter of the coaxial direct current injection unit (3).
5. A gas generator structure as claimed in claim 1, wherein: the top position of body portion (12) outer wall overlaps and is equipped with first sound cavity ring (13), and a plurality of cavitys have been seted up to the inboard of first sound cavity ring (13), and the multiunit aperture has been seted up to the position that body portion (12) just is to first sound cavity ring (13), and aperture intercommunication cavity and body portion (12) are inside.
6. A gas generator structure as claimed in claim 5, wherein: each group of small holes comprises two small holes, the apertures of the two small holes are the same, the number of the small holes is the same as that of the cavities on the first acoustic cavity ring (13), and each cavity is opposite to one group of small holes.
7. A gas generator structure as claimed in claim 5, wherein: the outer wall of the body part (12) is also provided with a second sound cavity ring (14), and the second sound cavity ring (14) is positioned at one side of the first sound cavity ring (13) which is away from the head part (1); the position of the body (12) facing the second sound cavity ring (14) is provided with a plurality of groups of small holes, and each group of small holes is communicated with the cavity and the inside of the body (12).
8. A gas generator structure as claimed in claim 7, wherein: the distance L0 between the center section A-A of the small hole opposite to the first acoustic cavity ring (13) and a bottom (11) meets the following relation: 0.5d 1 ≤L 0 ≤2d 1 Wherein d is 1 The diameter of the small hole is just opposite to the first acoustic cavity ring (13); the middle part of the first acoustic cavity ring (13) is aligned with the A-A section;
the distance L1 between the center section B-B of the small hole opposite to the second sound cavity ring (14) and a bottom (11) and a certain n-order longitudinal vibration mode to be restrained meet the following relation: l1=l3/n, where L3 is the distance of the body outlet from a base (11), n=1, 2,3; the middle part of the second sound cavity ring is aligned with the B-B section.
9. A gas generator structure as claimed in claim 7, wherein: the first acoustic cavity ring (13), the second acoustic cavity ring (14) and the body (12) are all welded and connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311837916.8A CN117703625A (en) | 2023-12-28 | 2023-12-28 | Gas generator structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311837916.8A CN117703625A (en) | 2023-12-28 | 2023-12-28 | Gas generator structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117703625A true CN117703625A (en) | 2024-03-15 |
Family
ID=90149810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311837916.8A Pending CN117703625A (en) | 2023-12-28 | 2023-12-28 | Gas generator structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117703625A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066037A (en) * | 2024-04-25 | 2024-05-24 | 北京中科宇航技术有限公司 | 110 Ton pintle type liquid oxygen kerosene engine gas generator |
-
2023
- 2023-12-28 CN CN202311837916.8A patent/CN117703625A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066037A (en) * | 2024-04-25 | 2024-05-24 | 北京中科宇航技术有限公司 | 110 Ton pintle type liquid oxygen kerosene engine gas generator |
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