CN113567141B - Distortion generating device, simulation method thereof and pressure distortion characteristic test system - Google Patents
Distortion generating device, simulation method thereof and pressure distortion characteristic test system Download PDFInfo
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- CN113567141B CN113567141B CN202010350155.3A CN202010350155A CN113567141B CN 113567141 B CN113567141 B CN 113567141B CN 202010350155 A CN202010350155 A CN 202010350155A CN 113567141 B CN113567141 B CN 113567141B
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004088 simulation Methods 0.000 title abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 104
- 239000007924 injection Substances 0.000 claims abstract description 104
- 230000000903 blocking effect Effects 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000002156 mixing Methods 0.000 abstract description 4
- 238000012512 characterization method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Classifications
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- 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
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present disclosure relates to a distortion generating apparatus, a simulation method thereof, and a pressure distortion characteristic test system. Wherein the distortion generating apparatus includes: the casing is provided with a plurality of air injection holes on the circumferential side wall; the air injection mechanism is arranged outside the casing and is used for injecting air to the air injection holes; and a plurality of blocking posts for blocking a portion of the plurality of gas injection holes. The circumferential side wall of the casing is provided with air injection holes to simulate pressure distortion, and the air injection direction is intersected with the incoming flow direction, so that the air injection and the incoming flow contact (blending) area are blended to form a low total pressure area; the jet range is adjusted by adjusting the blocking of the jet holes through the blocking columns, so that different pressure distortion ranges are realized, a plurality of sets of simulation nets or simulation plates are not manufactured during pressure distortion simulation, the manufacturing cost is reduced, the manufacturing period is shortened, and the applicability and the test efficiency of the distortion generating device are improved.
Description
Technical Field
The disclosure relates to the technical field of aeroengines, in particular to a distortion generating device, a simulation method thereof and a pressure distortion characteristic test system.
Background
In actual operation of an aeroengine, pressure distortion is generated at an engine inlet due to the influence of working conditions such as crosswind, maneuvering flight and the like, and the pressure distortion is a physical phenomenon of uneven pressure on the same section in a flow field.
Both theory and practice show that the pressure distortion of the engine inlet can have adverse effects on the performance and stability of the engine. Methods for evaluating the influence of inlet distortion on engine performance and stability mainly include two main methods, namely numerical methods and experimental methods. Currently, for numerical methods, correlation based on empirical data is more dependent on experimental data, and the unstable solution based on the time-marching method in the time domain cannot completely determine whether the actual physical instability phenomenon or the numerical calculation instability phenomenon is caused. Thus, the distortion test is an essential component of aircraft inlet/engine compatibility research, and also provides effective data support for developing and validating propulsion system stability and performance assessment.
In engine tests, in order to simplify test equipment and reduce test conditions, a simulation method is often adopted to establish a pressure distortion map (shown in fig. 1) consistent with the real conditions of an engine so as to evaluate the influence of distortion on the performance and stability of the engine. The pressure distortion simulation device is a test device for generating a specific pressure distortion map of the pneumatic section of the engine. The simulation net or the simulation board is the most commonly used pressure distortion simulation device at present, has the advantages of simple manufacture, convenient installation and high precision, but also has the disadvantages of high adjustment complexity, long period and the need of manufacturing multiple sets of distortion simulation nets. The honeycomb type distortion generating device is relatively simple to adjust, and only different honeycomb holes are required to be blocked when a distortion map is changed, but the manufacturing and processing of the honeycomb type distortion generating device are relatively complex, the honeycomb wall thickness is large, and flow field blocking is easy to cause.
Disclosure of Invention
The inventor researches find that the problems of high adjustment complexity and long processing period of the analog network exist in the related technology.
In view of the above, the embodiments of the present disclosure provide a distortion generating apparatus, a method of simulating the same, and a pressure distortion characteristic test system capable of simulating pressure distortion with a simple structure.
Some embodiments of the present disclosure provide a distortion generating apparatus including:
the casing is provided with a plurality of air injection holes on the circumferential side wall;
the air injection mechanism is arranged outside the casing and is used for injecting air to the air injection holes; and
and the blocking columns are used for blocking part of the air injection holes in the plurality of air injection holes.
In some embodiments, the axis of the gas injection holes is perpendicular to the axial direction of the casing.
In some embodiments, the plurality of gas injection holes includes a plurality of gas injection holes equally spaced along a circumference of the receiver.
In some embodiments, the number of gas injection holes arranged in a circumferential direction along the casing is 8 to 12.
In some embodiments, the plurality of gas injection holes comprises a plurality of groups of gas injection holes equally spaced along a circumferential direction of the casing, each group of gas injection holes comprising a plurality of gas injection holes equally spaced along an axial direction of the casing.
In some embodiments, the plurality of gas injection holes are uniformly distributed within a predetermined area on the circumferential sidewall of the receiver.
In some embodiments, the plugs include full plugs and half plugs.
In some embodiments, the gas injection mechanism includes a flow regulating valve, a gas supply tank, and a connection pipe, the gas supply tank being in communication with the gas injection hole through the connection pipe, the flow regulating valve being disposed on a passage of the connection pipe.
In some embodiments, the device further comprises a sealing cap having a sealing cavity, the sealing cap sealing the plurality of gas injection holes, the gas injection mechanism injecting gas through the sealing cap into the plurality of gas injection holes.
Some embodiments of the present disclosure provide a simulation method of the foregoing distortion generating apparatus, including:
according to the target pressure distortion map, blocking corresponding part of the air holes by using a blocking column;
and air is injected into the casing through the air injection hole by utilizing the air injection mechanism.
Some embodiments of the present disclosure provide a pressure distortion characterization test system including the aforementioned distortion generating device.
In some embodiments, the engine further comprises an air inlet channel, a tested engine and an exhaust volute, wherein the air inlet channel end of the casing is communicated with the air inlet channel, and the air outlet end of the casing is communicated with the air inlet of the tested engine.
Therefore, according to the embodiment of the disclosure, the circumferential side wall of the casing is provided with the air injection hole to simulate pressure distortion, and the air injection direction is intersected with the incoming flow direction, so that the air injection and the incoming flow contact (blending) area are blended to form a low total pressure area; the jet range is adjusted by adjusting the blocking of the jet holes through the blocking columns, so that different pressure distortion ranges are realized, a plurality of sets of simulation nets or simulation plates are not manufactured during pressure distortion simulation, the manufacturing cost is reduced, the manufacturing period is shortened, and the applicability and the test efficiency of the distortion generating device are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a pressure distortion map;
FIG. 2 is a schematic structural view of a casing in some embodiments of the distortion generating apparatus of the present disclosure;
FIGS. 3 and 4 are schematic structural views of a full occlusion column and a half occlusion column, respectively, in some embodiments of the distortion generating apparatus of the present disclosure;
FIG. 5 is a schematic structural view of a seal housing in some embodiments of the distortion generating apparatus of the present disclosure;
FIG. 6 is a schematic diagram of some embodiments of a pressure distortion characterization system of the present disclosure.
Description of the reference numerals
1. An air inlet channel; 2. a casing; 3. a tested engine; 4. a flow regulating valve; 5. a connecting pipe; 6. a gas supply tank; 7. an exhaust volute; 8. a gas injection hole; 9. a sealing cover; 10. a full occlusion column; 11. a semi-blocking column; 91. and the air injection connecting hole.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
In this disclosure, when a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device. When it is described that a particular device is connected to other devices, the particular device may be directly connected to other devices without intervening devices, or may be directly connected to other devices without intervening devices.
All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
As shown in connection with fig. 2-6, some embodiments of the present disclosure provide a distortion generating apparatus comprising: the device comprises a casing 2, an air injection mechanism and a plurality of blocking columns, wherein as shown in fig. 2, a plurality of air injection holes 8 are formed in the circumferential side wall of the casing 2; the air injection mechanism is arranged outside the casing 2 and is used for injecting air to the air injection holes 8; the blocking posts are used to block a portion of the gas injection holes 8 of the plurality of gas injection holes 8.
In this embodiment, as shown in fig. 2, the pressure distortion is simulated by forming the air injection holes 8 on the circumferential side wall of the casing 2 so that the air injection direction intersects the incoming flow direction, and thus the air injection and incoming flow contact (blending) area is blended, forming a low total pressure area; the jet range is adjusted by adjusting whether the jet holes 8 are blocked or not through the blocking columns, so that different pressure distortion ranges are realized, a plurality of sets of simulation nets or simulation plates are not manufactured during pressure distortion simulation, the manufacturing cost is reduced, the manufacturing period is shortened, and the applicability and the test efficiency of the distortion generating device are improved.
As shown in fig. 2, in some embodiments, the axis of the gas injection holes 8 is perpendicular to the axial direction of the casing 2, so that the gas injection direction is perpendicular to the incoming flow direction, and thus the gas injection and incoming flow contact (blending) area is blended more fully, and a more real low total pressure area is formed.
For the arrangement positions of the gas injection holes, in some embodiments, as shown in fig. 2, the plurality of gas injection holes 8 are uniformly distributed in a preset area on the circumferential side wall of the casing 2, so as to facilitate connection of the gas injection mechanism, and also facilitate adjustment of blocking or non-blocking of the gas injection holes.
As shown in fig. 2, in some embodiments, the plurality of gas injection holes 8 includes a plurality of gas injection holes 8 distributed at equal intervals along the circumferential direction of the receiver 2. The air injection holes 8 are uniformly distributed in the circumferential direction of the casing 2, and the overall distribution of the air injection holes in the circumferential range is adjusted by adjusting the blocking of the air injection holes, so that different circumferential distortion ranges are realized, and the method has higher feasibility. In some embodiments, the number of gas injection holes 8 arranged along the circumferential direction of the casing 2 is 8 to 12 in order to simulate different pressure distortions, and, taking the embodiment shown in fig. 2 as an example, the number of gas injection holes 8 arranged along the circumferential direction of the casing 2 is 9.
To enhance the applicability of the distortion generating apparatus, as shown in fig. 2, in some embodiments, the plurality of gas injection holes 8 include a plurality of groups of gas injection holes 8 equally spaced along the circumferential direction of the casing 2, each group of gas injection holes 8 includes a plurality of gas injection holes 8 equally spaced along the axial direction of the casing 2, and in the example shown in fig. 2, the plurality of gas injection holes 8 include 9 groups of gas injection holes 8 equally spaced along the circumferential direction of the casing 2, each group of gas injection holes 8 includes 3 gas injection holes 8 equally spaced along the axial direction of the casing 2.
In some embodiments, as shown in fig. 3 and 4, the plugging column includes a full plugging column 10 and a half plugging column 11, and two structural forms of the full plugging column 10 and the half plugging column 11 are respectively adopted, and the half plugging column has smaller plugging amount relative to the full plugging column, can relatively reduce the distortion range and the distortion strength, and can more conveniently adjust the circumferential range of the pressure distortion by selecting the proper full plugging column 10 and the proper half plugging column 11. As shown in fig. 2, in actual use, the gas injection holes on two sides can be partially blocked, the gas injection holes in the middle are not blocked, or the half-blocking column 11 is selected to realize half-blocking, so that the target distortion map shown in fig. 1 is constructed.
As shown in fig. 5, in some embodiments, the distortion generating device further includes a sealing cover 9 having a sealing cavity, the sealing cover 9 is hermetically covered on the plurality of air injection holes 8, the lower surface of the sealing cover 9 is tightly connected with the outer wall of the casing 2 through a fastening device to realize sealing, and the upper surface is connected with an air injection mechanism, and the air injection mechanism injects air to the plurality of air injection holes 8 through the sealing cover 9. One side of the sealing cover 9 is provided with an air injection connecting hole 91, and the air injection mechanism injects air into the sealing cover 9 through being communicated with the air injection connecting hole 91, and then the air injection mechanism injects air into the casing 2 through the air injection holes 8, so that the air injection mechanism uniformly supplies air to the plurality of air injection holes 8.
For the specific structure of the air injection mechanism, in some embodiments, as shown in fig. 6, the air injection mechanism includes a flow regulating valve 4, an air supply tank 6, and a connection pipe 5, the air supply tank 6 is communicated with the air injection hole 8 through the connection pipe 5, and the flow regulating valve 4 is disposed on a passage of the connection pipe 5. The flow regulating valve 4 is used for regulating the air flow, so that the air injection speed of the air injection hole is influenced, the air flow and the pressure of the air supply tank 6 in the sealing cavity can be regulated, and the intensity of distortion and the radial range of distortion can be changed. Because the flow regulating valve can be continuously regulated, the basic parameters of the distortion map can be continuously changed, the continuous regulation of target distortion is realized, and the applicability and the test efficiency of the distortion generating device are further improved.
Accordingly, some embodiments of the present disclosure provide a simulation method of the foregoing distortion generating apparatus, including:
according to the target pressure distortion map, blocking corresponding part of the air injection holes 8 in the plurality of air injection holes 8 by using a blocking column;
the air is injected into the casing 2 through the air injection holes 8 by the air injection mechanism.
By utilizing the method, the basic parameters of the distortion map are adjusted by blocking part of the air holes, so that the continuous adjustment of the parameters is realized, and the applicability and test efficiency of the simulation device are improved.
Some embodiments of the present disclosure provide a pressure distortion characteristic test system, including the foregoing distortion generating device, the distortion generating device is easy to assemble and disassemble, and can realize different pressure distortion ranges, thereby improving applicability and test efficiency of the pressure distortion characteristic test system.
In some embodiments, as shown in fig. 6, the pressure distortion characteristic test system further includes an air inlet 1, a tested engine 3, and an exhaust volute 7, where the casing 2 is connected to the air inlet 1 through a flange disc, an air inlet end of the casing 2 is communicated with the air inlet 1, and an air outlet end is communicated with an air inlet of the tested engine 3.
Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (11)
1. A distortion generating apparatus, comprising:
the circumferential side wall of the casing (2) is provided with a plurality of air injection holes (8);
the air injection mechanism is arranged outside the casing (2) and is used for injecting air to the air injection holes (8);
a plurality of blocking columns for blocking part of the gas injection holes (8) among the plurality of gas injection holes (8); and
the sealing cover (9) is provided with a sealing cavity, the sealing cover (9) is sealed on the plurality of air injection holes (8), and the air injection mechanism injects air to the plurality of air injection holes (8) through the sealing cover (9).
2. The distortion generating apparatus according to claim 1, wherein the axis of the gas injection hole (8) is perpendicular to the axial direction of the casing (2).
3. The distortion generating apparatus according to claim 1, wherein the plurality of gas ejection holes (8) includes a plurality of the gas ejection holes (8) distributed at equal intervals along the circumferential direction of the casing (2).
4. A distortion generating apparatus according to claim 3, wherein the number of the gas ejection holes (8) arranged in the circumferential direction along the casing (2) is 8 to 12.
5. The distortion generating apparatus according to claim 1, wherein a plurality of the gas injection holes (8) include a plurality of groups of the gas injection holes (8) distributed at equal intervals along a circumferential direction of the casing (2), each group of the gas injection holes (8) including a plurality of the gas injection holes (8) distributed at equal intervals along an axial direction of the casing (2).
6. The distortion generating apparatus according to claim 1, wherein a plurality of the gas injection holes (8) are uniformly distributed in a predetermined area on a circumferential side wall of the casing (2).
7. The distortion generating apparatus according to claim 1, wherein the plug includes a full plug (10) and a half plug (11).
8. The distortion generating apparatus according to claim 1, wherein the air injecting mechanism comprises a flow regulating valve (4), a connecting pipe (5) and an air supply tank (6), the air supply tank (6) communicates with the air injecting hole (8) through the connecting pipe (5), and the flow regulating valve (4) is provided on a passage of the connecting pipe (5).
9. A method of simulating the distortion generating apparatus of claim 1, comprising:
according to the target pressure distortion map, the corresponding part of the air injection holes (8) in the plurality of air injection holes (8) are blocked by the blocking column;
and the air injection mechanism is utilized to inject air into the casing (2) through the air injection holes (8).
10. A pressure distortion characteristic test system comprising the distortion generating apparatus according to any one of claims 1 to 8.
11. The pressure distortion characteristic test system according to claim 10, further comprising an intake duct (1), a test engine (3), and an exhaust volute (7), wherein an intake duct end of the casing (2) communicates with the intake duct (1), and an exhaust end communicates with an intake port of the test engine (3).
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| CN202010350155.3A CN113567141B (en) | 2020-04-28 | 2020-04-28 | Distortion generating device, simulation method thereof and pressure distortion characteristic test system |
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| CN202010350155.3A CN113567141B (en) | 2020-04-28 | 2020-04-28 | Distortion generating device, simulation method thereof and pressure distortion characteristic test system |
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| CN114876637A (en) * | 2022-04-13 | 2022-08-09 | 太仓点石航空动力有限公司 | Unsteady load engine inlet total pressure distortion simulation device, method and system |
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