CN115389277A - Sampling rake for high-temperature fuel gas at outlet of combustion chamber of aero-engine - Google Patents
Sampling rake for high-temperature fuel gas at outlet of combustion chamber of aero-engine Download PDFInfo
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- CN115389277A CN115389277A CN202110570548.XA CN202110570548A CN115389277A CN 115389277 A CN115389277 A CN 115389277A CN 202110570548 A CN202110570548 A CN 202110570548A CN 115389277 A CN115389277 A CN 115389277A
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- sampling
- rake
- sample gas
- outlet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention discloses a high-temperature gas sampling rake at an outlet of a combustion chamber of an aircraft engine. The sampling rake includes: the rake body is made of high-temperature-resistant materials; the sampling hole and the sample gas outlet are arranged on the rake body; the cooling channel and the sample gas flowing channel which are adjacent and not communicated are positioned in the containing cavity of the harrow body, a cooling medium is introduced into the cooling channel, and the sample gas flowing channel is communicated with the sampling hole and the sample gas outlet. The sample gas flow channel is a bending structure with at least two bending parts and extends along the directions of two ends close to the height direction of the rake body. The sample gas flow channel is bent towards the two ends of the rake body, so that the sample gas flow channel has a larger extension range in a limited space in the rake body, and further the flow path of the sample gas is larger, the sample gas can be sufficiently cooled, and the temperature of the sample gas at the sample gas outlet of the sampling rake can meet the ICAO-CAEP standard requirement.
Description
Technical Field
The invention relates to the field of aero-engines, in particular to a high-temperature gas sampling rake at an outlet of a combustion chamber of an aero-engine.
Background
With the iterative update of airworthiness regulations issued by ICAO-CAEP (International civil aviation organization, civil aviation Committee for environmental protection of Engine), the requirements on the emission performance indexes of the engine pollutants in the airworthiness evidence-obtaining assessment items of the aero-engine become stricter. The combustion chamber is used as a main pollutant emission source of an aircraft engine, and the pollutant emission performance of the combustion chamber is increasingly emphasized. In recent years, the inlet state of the combustion chamber of the engine is improved, so that the outlet temperature and the outlet pressure of the combustion chamber are continuously improved, and the gas sampling condition is more rigorous when the pollution emission performance test of the combustion chamber is carried out. As a core component of gas sampling, a gas sampling rake with higher temperature resistance, higher pressure resistance and longer service life is always a technical problem which is urgently needed to be overcome in the technical field of performance tests of combustion chambers.
The technical scheme of the existing sampling rake adopts machining and welding manufacturing processes, is limited by machining process precision and machining feasibility, and has the phenomena of uneven wall thickness, welding seams and the like. When the sampling rake is used for a combustion chamber LTO takeoff working condition test, reliability problems such as weld joint cracking, local bulging and the like are easy to occur, so that the service life of the sampling rake is only one time or a plurality of times, and the test is forced to be stopped due to the failure of the sampling rake. In addition, the restriction of processing feasibility also makes the design of sample harrow main part too complicated, and the gas that flows at a high speed of high temperature high pressure can only carry out pneumatic cooling deceleration and cooling temperature reduction through limited runner after getting into the sample harrow, very big increase the sample harrow export sample gas temperature control degree of difficulty, and it is too low often to appear the sample harrow export sample gas temperature, does not satisfy ICAO-CAEP standard requirement.
Therefore, when the existing sampling rake technology is used for carrying out a typical LTO cycle (engine takeoff-landing cycle, which generally comprises four stages of takeoff, climbing, approach and slow running) test of an aircraft engine combustion chamber, the problems that the sample gas processing requirement does not meet the ICAO-CAEP standard and the reliability and the service life of the sampling rake are not high easily occur.
Disclosure of Invention
The invention aims to overcome the defect that a sampling rake in the prior art cannot meet ICAO-CAEP standard sample gas treatment requirements, and provides a high-temperature gas sampling rake at an outlet of a combustion chamber of an aero-engine.
The invention solves the technical problems through the following technical scheme:
the utility model provides an aeroengine combustion chamber export high temperature gas sample harrow, sample harrow includes:
the rake body is made of high-temperature-resistant materials;
the sampling hole and the sample gas outlet are arranged on the rake body; and
the cooling channel and the sample gas flowing channel which are adjacent and not communicated are positioned in the accommodating cavity of the rake body, a cooling medium is introduced into the cooling channel, and the sample gas flowing channel is communicated with the sampling hole and the sample gas outlet;
the sample gas flow channel is a bending structure with at least two bending parts, and extends along the direction close to the two ends of the rake body in the height direction.
In this scheme, sample gas flow channel buckles towards the both ends of harrow body for in this internal limited space of harrow, sample gas flow channel has great extension, and then can make the flow path of sample gas great, can comparatively fully be cooled off, can only carry out pneumatic cooling deceleration and cooling through limited runner among the prior art compare, the sample gas temperature control degree of difficulty of the sample gas export of sample harrow in this scheme is lower, be favorable to making the sample gas temperature of sample harrow sample gas export satisfy ICAO-CAEP standard requirement. The cooling channel is used for cooling the sample gas and the rake body.
Preferably, the sample gas flow passage comprises a first flow pipe, a second flow pipe and a third flow pipe which are connected end to end, and a bent part is formed at the connection position of the second flow pipe and the adjacent first flow pipe and the adjacent third flow pipe respectively;
the first flow pipe is communicated with the sampling hole, and the third flow pipe is communicated with the sample gas outlet.
In this scheme, sample gas flow channel's structure is comparatively simple, and can realize longer flow path, is favorable to on the basis of simplifying the structure, guarantees the cooling effect of sample gas.
Preferably, the flow tube forming the sample gas flow channel has at least one variable diameter region in a flow direction of the sample gas in the sample gas flow channel;
along the flowing direction, the inner diameter of the pipeline in the diameter-variable area is reduced firstly and then increased.
In this scheme, the reducing region of increase after the pipeline internal diameter reduces earlier for shrink earlier the expansion when the sample gas flows, more be favorable to realizing the cooling to the sample gas.
Preferably, the sample gas flow path further includes a connection pipe, the connection pipe is connected and communicated between the second flow tube and the third flow tube, and an inner diameter of the connection pipe is smaller than inner diameters of the second flow tube and the third flow tube.
In this scheme, the inner diameter of the connecting pipe is smaller than the inner diameters of the second flow pipe and the third flow pipe, that is, the inner diameter of the connecting pipe is smaller than the inner diameter of the upstream second flow pipe and the inner diameter of the downstream third flow pipe, that is, the connecting pipe and the adjacent portions of the second flow pipe and the third flow pipe form a reducing area, so that the sample gas flowing through the reducing area contracts and expands first, and the sample gas is cooled.
Preferably, the number of the connecting pipes is multiple, and the connecting pipes are arranged at intervals.
In this scheme, the setting of a plurality of connecting pipes for the sample gas can comparatively evenly just experience the process of contracting earlier afterwards expansion reliably, and then more is favorable to realizing the cooling to the sample gas, in addition, compares in the scheme that adopts same connecting pipe, and this kind of setting also can reduce the demand to the connecting pipe.
Preferably, the sampling hole and the connecting pipe are both close to the bottom end of the rake body.
In this scheme, the bottom that the thief hole and connecting pipe all were close to the harrow body more is favorable to increasing the flow path of appearance gas, more is favorable to realizing the cooling to appearance gas.
Preferably, the first flow tube, the second flow tube and the third flow tube have the same internal diameter.
Preferably, a sampling pipe is arranged in the sampling hole and communicated with the sample gas flowing channel.
Preferably, the number of the sampling holes is a plurality of, and a plurality of the sampling holes are formed on the side wall of the rake body, the sampling holes have a sampling inlet and a sampling outlet, and the sampling inlet protrudes outwards from the side wall of the rake body, and the sampling inlet is smaller than the sampling outlet.
In this scheme, the sampling hole protrusion is in the lateral wall of harrow body, and the size of sample entry is less than the size of sample export, is favorable to reducing the stress concentration of sampling hole department, is favorable to realizing the cooling around the sampling hole.
Preferably, the sampling hole is of a tapered structure.
In this scheme, set up the thief hole into the toper structure, the even increase of internal diameter of thief hole is favorable to the entering of sample gas, is favorable to realizing the cooling of thief hole department.
Preferably, a cooling inlet and a cooling outlet are arranged at the top of the rake body, and the cooling inlet, the cooling channel and the cooling outlet are communicated;
the outer wall of the rake body is also provided with a connecting flange, and the connecting flange is provided with a plurality of connecting holes which are arranged at intervals.
Preferably, the sampling rake is made by 3D printing.
In this scheme, the formation is printed through 3D to the sample harrow, compares in prior art's machining and welding manufacturing process, and 3D prints the problem that can avoid wall thickness inequality and welding seam, and 3D prints and can realize comparatively meticulous processing, when being used for the LTO operating mode test of taking off with the sample harrow, can avoid the reliability problem of welding seam fracture, local swell, is favorable to improving the life of sample harrow.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
in this sample harrow, sample gas flow channel buckles towards the both ends of harrow body for in this internal limited space of harrow, sample gas flow channel has great extension, and then can make the flowpath of sample gas great, can comparatively fully be cooled off, can only carry out pneumatic cooling deceleration and cooling through limited runner among the prior art compare, the sample gas temperature control degree of difficulty of the sample gas export of sample harrow in this scheme is lower, be favorable to making the sample gas temperature of sample harrow sample gas export satisfy ICAO-CAEP standard requirement.
Drawings
Fig. 1 is a schematic structural diagram of a high-temperature gas sampling rake at an outlet of a combustion chamber of an aircraft engine according to a preferred embodiment of the invention.
Fig. 2 is a schematic structural view of a portion D in fig. 1.
Fig. 3 is another schematic structural diagram of a high-temperature gas sampling rake at the outlet of the combustion chamber of the aircraft engine according to a preferred embodiment of the invention.
Fig. 4 isbase:Sub>A schematic sectional view alongbase:Sub>A-base:Sub>A in fig. 3.
Fig. 5 is a schematic sectional view along B-B in fig. 3.
Fig. 6 is a schematic sectional structure view taken along C-C in fig. 3.
Description of reference numerals:
1 harrow body
2 sampling hole
3 first flow tube
4 second flow tube
5 connecting pipe
6 third flow pipe
7 sample gas outlet
8 Cooling inlet
9 first cooling channel section
10 second cooling channel section
11 cooling outlet
12 connecting flange
13 connecting hole
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the invention thereto.
As shown in fig. 1-6, the present embodiment discloses a high temperature gas sampling rake at the outlet of a combustion chamber of an aircraft engine, which comprises a rake body 1, a sampling hole 2, a sample gas outlet 7, and a cooling channel and a sample gas flow channel which are adjacent and not communicated. Wherein, the harrow body 1 is made of high-temperature resistant material. The sampling hole 2 and the sample gas outlet 7 are arranged on the rake body 1. The cooling channel and the sample gas flow channel are positioned in the accommodating cavity of the rake body 1, the cooling channel is used for introducing a cooling medium, and the sample gas flow channel is communicated with the sampling hole 2 and the sample gas outlet 7. Wherein, the sample gas flow channel is a bending structure with at least two bending parts, and the sample gas flow channel extends along the direction of the two ends close to the height direction of the rake body 1.
In this embodiment, sample gas flow channel buckles towards the both ends of harrow body 1 for in harrow body 1 limited space, sample gas flow channel has great extension, and then can make the flowpath of sample gas great, can be cooled off comparatively fully, can only carry out pneumatic cooling deceleration and cooling down through limited runner among the prior art, the sample gas temperature control degree of difficulty of sample gas export 7 of sample harrow in this scheme is lower, be favorable to making the sample gas temperature of sample harrow sample gas export 7 satisfy ICAO-CAEP standard requirement. Wherein, the cooling channel is not only used for realizing the cooling to the sample gas, but also used for realizing the cooling to the harrow body 1.
In addition, as an illustrative embodiment, the rake body 1 has a cylindrical structure with an outer diameter of 19 mm.
As shown in fig. 4, a cooling channel is formed between the inner wall of the rake body 1 and the outer wall of the sample gas flow channel, and the cooling channel includes a first cooling channel portion 9, a second cooling channel portion 10 on both sides, and a bottom channel portion (not shown) communicating between the first cooling channel portion 9 and the second cooling channel portion 10.
In a preferred embodiment, as shown in fig. 4-6, the sample gas flow path comprises a first flow tube 3, a second flow tube 4 and a third flow tube 6 connected end to end, and a bend is formed at the connection between the second flow tube 4 and the adjacent first flow tube 3 and third flow tube 6. The first flow tube 3 communicates with the sampling hole 2, and the third flow tube 6 communicates with the sample gas outlet 7.
The structure of the sample gas flow channel is simple, a long flow path can be achieved, and the sample gas cooling device is beneficial to ensuring the cooling effect of the sample gas on the basis of simplifying the structure.
In another preferred embodiment, as shown in FIGS. 4-6, the flow tube forming the sample gas flow channel has at least one variable diameter region along the direction of flow of the sample gas in the sample gas flow channel. Along the flowing direction, the inner diameter of the pipeline in the diameter-variable area is firstly reduced and then increased.
The diameter-variable area is formed by reducing the inner diameter of the pipeline firstly and then increasing the inner diameter of the pipeline, so that the sample gas is contracted and then expanded when flowing, and the sample gas is cooled more favorably.
As shown in fig. 6, the sample gas flow path further includes a connection pipe 5, the connection pipe 5 is connected and communicated between the second flow tube 4 and the third flow tube 6, and the inner diameter of the connection pipe 5 is smaller than the inner diameters of the second flow tube 4 and the third flow tube 6.
The inner diameter of the connecting pipe 5 is smaller than the inner diameters of the second flow tube 4 and the third flow tube 6, that is, the inner diameter of the connecting pipe 5 is smaller than the inner diameter of the upstream second flow tube 4 and the inner diameter of the downstream third flow tube 6, that is, the connecting pipe 5 and the adjacent portions of the second flow tube 4 and the third flow tube 6 form a reducing area, so that the sample gas flowing through the reducing area is contracted and then expanded, thereby facilitating the cooling of the sample gas.
Further, the number of the connection pipes 5 is plural, and the plurality of connection pipes 5 are arranged at intervals.
In this scheme, the setting of a plurality of connecting pipes 5 for the sample gas can comparatively evenly and experience the process of contraction earlier afterwards expansion reliably, and then more is favorable to realizing the cooling to the sample gas, in addition, compares in the scheme that adopts same connecting pipe 5, and this kind of setting also can reduce the demand to connecting pipe 5.
The connection pipe 5 may have a uniform cross-sectional structure, such as a cylindrical structure having an inner diameter of 1mm, or may have a variable diameter structure having another shape. As for the number of the connection pipes 5, in the exemplary embodiment, the number of the connection pipes 5 is 5.
Regarding the reducing area, the flow pipe has at least one reducing area along the flowing direction of the sample gas, that is, the extending range of the sample gas flow channel has at least one reducing area, which means that at least one reducing area is arranged at intervals along the upstream direction and the downstream direction. The plurality of reducing areas formed by the plurality of connecting pipes 5 refers to at least one reducing area formed at the position of the connecting pipe 5 and not equal to the flow direction. Of the two, the relationship between the former (at least one variable diameter region in the flow direction) and the latter (a plurality of variable diameter regions in the vicinity of the position of the connecting pipe 5) is similar to that between the series connection and the parallel connection.
In another preferred embodiment, the first flow tube 3, the second flow tube 4 and the third flow tube 6 have the same internal diameter. Of course, in alternative embodiments, the internal diameters of the first flow tube 3, the second flow tube 4 and the third flow tube 6 may or may not be different from each other.
As shown in FIGS. 1-6, the sampling hole 2 and the connecting tube 5 are both near the bottom end of the rake body 1.
Wherein, the bottom that the thief hole 2 and connecting pipe 5 all are close to harrow body 1 more is favorable to increasing the flow path of appearance gas, more is favorable to realizing the cooling to appearance gas.
A sampling tube (not shown) is arranged in the sampling hole 2, and the sampling tube is communicated with the sample gas flowing channel.
As shown in fig. 1-3, the sampling holes 2 are formed in a plurality of numbers, and the sampling holes 2 are formed on the side wall of the rake body 1, the sampling holes 2 have a sampling inlet and a sampling outlet, and the sampling inlet protrudes outwards from the side wall of the rake body 1, and the sampling inlet is smaller than the sampling outlet.
Wherein, the sampling hole 2 protrusion is in the lateral wall of harrow body 1, and the size of sample entry is less than the size of sample export, is favorable to the high temperature thermal stress of greatly reduced sampling hole 2 department, is favorable to realizing the cooling around the sampling hole 2, also is favorable to improving the life of sample harrow.
Preferably, the sampling hole 2 is of a tapered configuration. Set up sampling hole 2 into the toper structure, the even increase of internal diameter of sampling hole 2 is favorable to the entering of sample gas, is favorable to realizing the cooling of sampling hole 2 department.
A sampling passage with the same diameter, for example, the inner diameter of 1mm, is arranged in the sampling hole 2, and the connection part of the bottom of the sampling hole 2 and the rake body 1 is subjected to transition treatment so as to ensure that a cooling medium can sufficiently cool a sampling opening as much as possible.
Note that, as shown in fig. 1 to 3, in the present embodiment, the number of sampling holes 2 is 5. In other alternative embodiments, other numbers may be set according to actual requirements.
In addition, the top of the rake body 1 is provided with a cooling inlet 8 and a cooling outlet 11, and the cooling inlet 8, the cooling channel and the cooling outlet 11 are communicated. The outer wall of the rake body 1 is further provided with a connecting flange 12, and the connecting flange 12 is provided with a plurality of connecting holes 13 arranged at intervals.
It should be noted that, as an exemplary embodiment, the inner diameter of the cooling inlet 8 and the cooling outlet 11 is 6mm.
In another preferred embodiment, the sampling rake is made by 3D printing. The formation is printed through 3D to the sample harrow, compares in the machining and the welding manufacture process among the prior art, and 3D prints the problem that can avoid wall thickness inequality and welding seam, and 3D prints and can realize comparatively meticulous processing, when being used for the LTO operating mode test of taking off with the sample harrow, can avoid the reliability problem of welding seam fracture, local swell, is favorable to improving the life of sample harrow.
The following sampling procedure is briefly described below.
After the sample gas flows into the sampling rake from the sampling holes 2, the sample gas is gathered to the first flow pipe 3, is gathered therein, is depressurized and cooled due to the pneumatic action of the gas flow, then flows upwards along the first flow pipe 3 to the top of the sampling rake, turns over to the second flow pipe 4, flows downwards along the second flow pipe 4, completes one-time turn-back flow to reduce the temperature of the sample gas through sufficient heat exchange with a cooling medium, and then the sample gas flows into the connecting pipes 5. The sample gas is compressed and accelerated in the connection pipe 5, then flows into the third flow pipe 6, is further depressurized and decelerated in the third flow pipe 6, then flows upwards along the third flow pipe 6, and finally flows out from the sample gas outlet 7, so that the sampling of the sample gas is completed.
In the present embodiment, the positions of the 5 connection pipes 5 in the height direction correspond to the 5 sampling holes 2.
The following cooling process is briefly described below.
The cooling medium enters the sampling rake from the cooling inlet 8, flows into the first cooling channel part 9 in the cooling channel and flows downwards along the first cooling channel part 9, cools the rake body 1, the sampling hole 2, the first flow pipe 3 and the second flow pipe 4, then turns into the second cooling channel part 10 through the bottom cooling channel at the bottom of the sampling rake and flows upwards, and after the rake body 1, the second flow pipe 4, the connecting pipe 5 and the third flow pipe 6 are cooled sufficiently, the cooling medium flows out of the sampling rake from the cooling outlet 11. The whole cooling flow passage is unobstructed and has no dead angle, the pressure difference of the inlet and the outlet of the cooling medium can be reduced, and the local boiling is prevented.
In the present embodiment, the cooling medium is water. Of course, in other alternative embodiments, other cooling mediums may be used.
In the invention, the sample gas flow channel is bent towards two ends of the rake body 1, so that the sample gas flow channel has a larger extension range in a limited space in the rake body 1, and further, the flow path of the sample gas is larger, and the sample gas can be sufficiently cooled, compared with the prior art that pneumatic cooling and speed reduction and cooling can be carried out only through a limited flow channel, the sample gas temperature control difficulty of the sample gas outlet 7 of the sampling rake is lower in the scheme, and the sample gas temperature of the sample gas outlet 7 of the sampling rake can meet the ICAO-CAEP standard requirement. In addition, the sampling rake prints the machine-shaping through 3D, compares in the machining and welding manufacturing process among the prior art, and 3D prints the problem that can avoid wall thickness inequality and welding seam, and 3D prints and can realize comparatively meticulous processing, when being used for the LTO operating mode test that takes off with the sampling rake, can avoid the reliability problem of welding seam fracture, local swell, is favorable to improving the life of sampling rake.
While specific embodiments of the invention have been described above, it will be understood by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (12)
1. The utility model provides an aeroengine combustion chamber export high temperature gas sample harrow which characterized in that, the sample harrow includes:
the rake body is made of high-temperature-resistant materials;
the sampling hole and the sample gas outlet are arranged on the rake body; and
the adjacent and non-communicated cooling channel and the sample gas flow channel are positioned in the accommodating cavity of the rake body, a cooling medium is introduced into the cooling channel, and the sample gas flow channel is communicated with the sampling hole and the sample gas outlet;
the sample gas flow channel is a bending structure with at least two bending parts, and extends along the direction close to the two ends of the rake body in the height direction.
2. The aero-engine combustion chamber outlet high temperature gas sampling rake of claim 1, wherein the sample gas flow channel comprises a first flow pipe, a second flow pipe and a third flow pipe which are connected end to end, and a bent portion is formed at a connection position of the second flow pipe and the adjacent first flow pipe and the adjacent third flow pipe;
the first flow pipe is communicated with the sampling hole, and the third flow pipe is communicated with the sample gas outlet.
3. The aero-engine combustor exit high temperature gas sampling rake of claim 2 wherein the flow tube forming the sample gas flow channel has at least one variable diameter region along the direction of sample gas flow within the sample gas flow channel;
along the flowing direction, the inner diameter of the pipeline in the diameter-variable area is reduced firstly and then increased.
4. The aero-engine combustor outlet high temperature gas sampling rake of claim 3 wherein the sample gas flow channel further comprises a connecting tube, the connecting tube is connected and communicated between the second flow tube and the third flow tube, and the connecting tube has an inner diameter smaller than the inner diameters of the second flow tube and the third flow tube.
5. The aero-engine combustor exit high temperature gas sampling rake of claim 4 wherein the number of said connecting tubes is plural, and a plurality of said connecting tubes are spaced apart.
6. The aero-engine combustor exit high temperature gas sampling rake of claim 4 wherein the sampling bore and the connecting tube are both near the bottom end of the rake body.
7. The aero-engine combustor exit high temperature gas sampling rake of claim 2 wherein the first flow tube, the second flow tube and the third flow tube have the same inside diameter.
8. The aero-engine combustor outlet high temperature gas sampling rake of claim 1 wherein a sampling tube is disposed within the sampling bore, the sampling tube being in communication with the sample gas flow passage.
9. The aero-engine combustor outlet high temperature gas sampling rake as claimed in claim 1, wherein the number of the sampling holes is plural, and the plural sampling holes are formed in a side wall of the rake body, the sampling holes have a sampling inlet and a sampling outlet, and the sampling inlet protrudes outward from the side wall of the rake body, and the sampling inlet is smaller than the sampling outlet.
10. The aero-engine combustor exit high temperature gas sampling rake of claim 9 wherein the sampling holes are of a conical configuration.
11. The aero-engine combustion chamber outlet high temperature gas sampling rake as defined in claim 1, wherein a cooling inlet and a cooling outlet are provided at the top of the rake body, the cooling inlet, the cooling channel and the cooling outlet being in communication;
the outer wall of the rake body is also provided with a connecting flange, and the connecting flange is provided with a plurality of connecting holes which are arranged at intervals.
12. The aero-engine combustor exit high temperature gas sampling rake according to any one of claims 1 to 11 wherein the sampling rake is made by 3D printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110570548.XA CN115389277A (en) | 2021-05-25 | 2021-05-25 | Sampling rake for high-temperature fuel gas at outlet of combustion chamber of aero-engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110570548.XA CN115389277A (en) | 2021-05-25 | 2021-05-25 | Sampling rake for high-temperature fuel gas at outlet of combustion chamber of aero-engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115389277A true CN115389277A (en) | 2022-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110570548.XA Pending CN115389277A (en) | 2021-05-25 | 2021-05-25 | Sampling rake for high-temperature fuel gas at outlet of combustion chamber of aero-engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115389277A (en) |
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2021
- 2021-05-25 CN CN202110570548.XA patent/CN115389277A/en active Pending
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