Distortion gas testing device and method

Abstract

The invention discloses a distorted gas testing device and method, the distorted gas testing device comprises a distortion device (1) and a gas pipeline (2), the distortion device (1) comprises a plurality of distortion pipelines (12), the distortion pipelines (12) are communicated with the gas pipeline (2), each distortion pipeline (12) comprises a main pipe (120) and a plurality of branch pipes (121), the main pipe (120) is communicated with the branch pipes (121), the branch pipes (121) of the distortion pipelines (12) form a plurality of annular structures, and the distortion pipelines (12) are communicated with the gas pipeline (2). The gas pipeline (2) comprises a heat exchanger (21). The device can be customized according to experiment requirements, the arrangement of the distortion pipelines of the distortion device can be adjusted, the arrangement mode and angle of the branch pipes and the gas outlet holes can be flexibly adjusted, and the device can adapt to various working conditions and meet complex experiment requirements.

Description

Technical Field

[0001] The present invention relates to the field of simulation tests of distortion devices, and particularly to a distortion gas test device and method. Background Art

[0002] Total pressure distortion means that the total pressure at the inlet section of the compressor of a gas turbine shows a non-uniform distribution. Total pressure distortion can cause multiple hazards, such as a decrease in the total pressure ratio and efficiency of the compressor, a reduction in the stall margin, and a threat to the safe operation of the gas turbine.

[0003] During the startup process of a gas turbine, the low-pressure compressor is in a rotating stall state, while the high-pressure compressor is still in a stable operating state. The total temperature and total pressure at the outlet of the low-pressure compressor are unevenly distributed in the radial and tangential directions, that is, there are serious total pressure distortion and total temperature distortion at the inlet of the high-pressure compressor, reducing the stability margin of the high-pressure compressor. Therefore, it is necessary to study the coupled distortion of total temperature and total pressure.

[0004] In Europe and America, a distortion grid generator is usually used to simulate total pressure distortion. The total pressure loss caused by the airflow passing through the grid is used to generate total pressure distortion, and different distortion patterns are generated by using grids with different density distributions. Since the airflow pulsation behind the grid is small, this method mainly generates steady-state total pressure distortion.

[0005] When simulating total temperature distortion, the embedded combustion type and the resistance wire heating type are usually adopted. The temperature distortion generator of the embedded combustion type usually sets a micro combustion chamber inside the compressor passage, and realizes local airflow heating by controlling the combustion state. This device has a complex structure and high control difficulty. The temperature distortion generator of the resistance wire heating type usually arranges electric heating tubes at the inlet of the compressor, but it has a risk of electric leakage.

[0006] In the patent document CN107505138B, a complex distortion generator for compressor stability tests is disclosed, including a steady-state total pressure distortion generator and a swirl distortion generator arranged in the compressor casing along the length direction; the steady-state total pressure distortion generating device generates different ranges of steady-state circumferential total pressure distortion by controlling distributed nozzles, and adjusts the jet velocity of the nozzles to change the intensity of the steady-state total pressure distortion; the swirl distortion generator adjusts the swirl distortion form by changing the angle of the swirl adjustment plate in the swirl generator transition section, generates three types of swirl distortions such as co-rotating single vortex, counter-rotating single vortex and pair of vortices, and adjusts the air pump pressure and the solenoid valve opening to change the intensity of the swirl distortion, without solving the problem that the current distortion generator cannot simultaneously simulate total temperature and total pressure distortion, and the control difficulty of the distortion device is high.

[0007] In the patent document CN110044628B, a dynamic distortion generator for compressor stability tests and its method are disclosed, including a bracket, hinges, and a control system. The bracket consists of multiple concentric rings; several motor fixing beams are installed radially on each ring; there are several hinges, and the hinge shafts are installed radially on the top surfaces of the motor fixing beams. A stepping motor is installed on the back of the motor fixing beam, and an opening adjustment rod perpendicular to the motor shaft is provided at the end of the motor shaft. By driving the motor shaft to rotate with the stepping motor, the angle of the opening adjustment rod is changed to control the opening and closing degree of the hinge; the control system is connected to the stepping motor to control the stepping motor, aiming to solve the problems that the current distortion generator cannot simultaneously simulate total temperature and total pressure distortion, and the control of the distortion device is difficult.

[0008] In summary, the above two existing patents have not solved the problems that the current distortion generator cannot simultaneously simulate total temperature and total pressure distortion, and the control of the distortion device is difficult. Summary of the Invention

[0009] Based on the above technical problems, the present invention proposes a distortion gas test device and method to solve the problems that the current distortion generator cannot simultaneously simulate total temperature and total pressure distortion, and the control of the distortion device is difficult.

[0010] To achieve the above object, the present invention proposes a distortion gas test device.

[0011] A distortion gas test device includes a distortion device and a gas pipeline. The distortion device includes multiple distortion pipelines, the distortion pipelines are communicated with the gas pipeline, the distortion pipeline includes a main pipe and multiple branch pipes, the main pipe is communicated with the multiple branch pipes, and the multiple branch pipes of the multiple distortion pipelines form multiple ring structures. The gas pipeline includes a heat exchanger.

[0012] Further, the distortion device further includes a hub and a casing. The hub and the casing are ring structures, and the hub is arranged inside the casing.

[0013] Further, the distortion pipeline is arranged between the hub and the casing.

[0014] Further, the length of the branch pipe is arranged in an increasing manner along the extending direction of the main pipe.

[0015] Further, the middle part of the branch pipe is communicated with the main pipe, and the branch pipes are symmetrically arranged on both sides of the main pipe.

[0016] Further, the shortest branch pipe in the distortion pipeline is fixed to the hub; the longest branch pipe in the distortion pipeline is fixed to the casing.

[0017] Further, the distortion pipeline includes an intake pipe, and the intake pipe is communicated with the gas pipeline.

[0018] Further, the distortion pipeline includes air outlet holes, and the air outlet holes are arranged on the main pipe and the branch pipe.

[0019] Further, the diameter range of the air outlet holes is 2 mm - 5 mm.

[0020] Further, the diameters of the air outlet holes are arranged in a gradient decreasing manner along the extending direction of the branch pipe. The diameter of the air outlet hole closer to the main pipe is larger, and the range of each decrease in the diameter of the air outlet hole is 1 mm - 2 mm.

[0021] Further, the axis of the main pipe and the axis of the branch pipe form a distortion plane, and the included angle range between the central axis of the air outlet hole and the distortion plane is 30° - 60°.

[0022] Further, the heat exchanger includes a cooling working medium, and the cooling working medium includes water, ethanol or mineral oil.

[0023] Further, the gas pipeline includes a gas transmission pipe, and the gas transmission pipe communicates the downstream gas of the air flow channel of the test piece with the distortion device.

[0024] Further, a part of the gas transmission pipe is arranged inside the heat exchanger.

[0025] To achieve the above object, the present invention also provides a test method using the above distortion gas test device.

[0026] A test method using the above distortion gas test device, characterized by comprising:

[0027] S1: Arranging the distortion device inside the air flow channel of the test piece;

[0028] S2: Opening the gas pipeline to enable the downstream gas of the air flow channel of the test piece to enter the heat exchanger;

[0029] S3: When the temperature and pressure of the gas inside the heat exchanger meet the test requirements, introducing the gas into the distortion device.

[0030] Further, in the step S2, it includes:

[0031] Closing the second valve and opening the first valve to enable the downstream gas of the air flow channel of the test piece to enter the heat exchanger.

[0032] Further, in the step S2, it further includes:

[0033] Inject a cooling working fluid into the heat exchanger, adjust the total temperature of the distorted gas, and regulate the total pressure of the distorted gas by adjusting the opening degree of the first valve.

[0034] Further, in the step S2, it further includes:

[0035] Measure the internal temperature and pressure of the heat exchanger through a pressure gauge and a thermometer. If the preset value is reached, open the second valve.

[0036] Based on the above technical solutions, the present invention has at least the following beneficial effects:

[0037] 1. The present invention provides a distorted gas test device and method. By connecting the gas pipeline to the downstream of the specimen and passing the gas through the distortion device after pretreatment, no additional gas source supply is required, which simplifies the experimental device, reduces costs, and can quickly generate the required total temperature and total pressure distorted gas, greatly improving the experimental preparation efficiency. The present invention can be customized according to the CFD calculation results or experimental requirements. Not only can the arrangement of the distortion pipelines of the distortion device be adjusted, but the arrangement mode (uniform or non-uniform) and angle of the branch pipes and air outlets can also be flexibly adjusted to adapt to various working conditions and meet complex experimental requirements.

[0038] 2. The present invention provides a distorted gas test device and method, which integrates the functions of total temperature, total pressure distortion and swirl coupling into one, solves the problem that the prior art cannot simulate total temperature and total pressure distortion at the same time, fills the technical gap, and this innovative design makes the experimental device more compact and efficient, reducing the complexity and cost of experimental equipment; by adjusting the geometric parameters of the branch pipes and air outlets, the present invention can accurately simulate total temperature and total pressure distortions with different intensities and distributions, improve the experimental accuracy, and the angle of the air outlets can be set according to the test requirements to generate swirls in different directions, providing diverse experimental conditions for studying complex flow fields. This accurate simulation ability makes the experimental results more reliable and helps to deeply study the aerodynamic performance and stability of gas turbine compressors.

[0039] 3. The present invention provides a distorted gas test device and method, which integrates functions such as air extraction, regulation, and distribution, reducing the complexity of the experimental device and the installation and commissioning time; through the rapid adjustment of valves and heat exchangers, different experimental conditions can be quickly switched, improving the experimental efficiency. This simplified design makes the experimental operation more convenient, reduces the time for experimental preparation and adjustment, and improves the overall experimental efficiency; by using the high-temperature and high-pressure gas at the outlet of the compressor, no additional equipment is required, reducing the equipment procurement and operation costs. At the same time, the device of the present invention has a simple design, low maintenance cost, and long service life, meeting the requirements of sustainable development, reducing the research cost, improving the resource utilization rate, and having significant economic benefits and sustainability. Brief Description of the Drawings

[0040] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not unduly limit the present invention. In the drawings:

[0041] Figure 1 shows a schematic structural diagram of a suction cascade test device according to an embodiment;

[0042] Figure 2 shows a three-dimensional structural diagram of a distortion device of a suction cascade test device according to an embodiment;

[0043] Figure 3 shows a front view of a distortion device according to an embodiment;

[0044] Figure 4 shows a schematic structural diagram of a distortion pipeline according to an embodiment;

[0045] Figure 5 shows a schematic structural diagram of a distortion pipeline according to another embodiment.

[0046] Among them, the above-mentioned drawings include the following reference numerals:

[0047] 1. Distortion device; 2. Gas pipeline;

[0048] 11. Hub; 12. Distortion pipeline; 13. Casing;

[0049] 21. Heat exchanger; 22. Gas transmission pipe; 23. First valve; 24. Second valve; 25. Pressure gauge; 26. Thermometer;

[0050] 120. Main pipe; 121. Branch pipe; 122. Intake pipe; 123. Air outlet hole;

[0051] 211. Cooling working medium. Detailed implementation manners

[0052] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0053] The present invention will be further described in detail below in conjunction with specific embodiments, and these embodiments should not be construed as limiting the scope claimed by the present invention. The term "comprising" indicates the presence of features when used, but does not exclude the presence or addition of one or more other features; the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0054] In the description, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0055] Embodiment

[0056] The present invention provides a distortion gas test device, as Figure 1 shown in the figure, which includes a distortion device 1 and a gas pipeline 2. The distortion device 1 includes a plurality of distortion pipelines 12, the distortion pipelines 12 are communicated with the gas pipeline 2, the distortion pipelines 12 include a main pipe 120 and a plurality of branch pipes 121, the main pipe 120 is communicated with the plurality of branch pipes 121, and the plurality of branch pipes 121 of the plurality of distortion pipelines 12 form a plurality of ring structures. The gas pipeline 2 includes a heat exchanger 21.

[0057] Furthermore, the distortion gas test device includes a hub 11 and a casing 13, as Figure 2 shown in the figure. The hub 11 and the casing 13 are arranged outside the distortion pipeline 12. Both the hub 11 and the casing 13 are ring / tubular structures. The diameter of the casing 13 is larger than that of the hub 11. A part of the gas delivery pipe 22 of the gas pipeline 2 is arranged around the casing 13 and connected to the distortion pipeline 12.

[0058] In this embodiment, as Figure 3 shown in the figure, there are 8 distortion pipelines 12 provided in the distortion device 1. The distortion pipelines 12 are arranged in the circular space formed inside the hub 11 and the casing 13. The length of the branch pipes 121 of the distortion pipelines 12 increases along the radially outward extension direction of the hub 11, and the increasing range is 5 mm - 10 mm.

[0059] Specifically, as shown in Figure 3 , inside the distortion gas test device, a hub 11 is provided. Outside the hub 11, a casing 13 is provided. Both the casing 13 and the hub 11 are annular / tubular structures and are concentrically arranged. The shortest branch pipe 121 in the distortion pipeline 12 is connected to the hub 11, and the longest branch pipe 121 in the distortion pipeline 12 is fixed to the inner side of the casing 13. The branch pipe 121 is arc-shaped. The main pipe 120 and the multiple branch pipes 121 are located in the same distortion plane. The distortion plane is perpendicular to the axes of the casing 13 and the hub 11. The multiple branch pipes 121 are arranged parallel to the arcs where the outer wall of the hub 11 and the inner wall of the casing 13 intersect with the distortion plane. The length of the branch pipe 121 of the distortion pipeline 12 increases by 8 mm in the radially outward direction along the hub 11, and the fan-shaped areas occupied by each distortion pipeline 12 are equal.

[0060] In other embodiments, the inside of the distortion device 1 can also be provided with 2, 4, or 16 distortion pipelines 12, and the fan-shaped areas occupied by the multiple distortion pipelines 12 in the distortion gas test device are all equal.

[0061] Further, the casing 13 includes a pipe through-hole, so that the intake pipe 122 extends along the direction of the main pipe 120 to the outside of the casing 13 and is connected to the gas pipeline 2.

[0062] Further, as shown in Figure 4 , the distortion pipeline 12 includes 1 main pipe 120, 4 branch pipes 121, and 1 intake pipe 122. The main pipe 120, the branch pipes 121, and the intake pipe 122 are all connected. In other implementations, the distortion pipeline 12 can be provided with the main pipe 120 and 3 of the branch pipes 121 as shown in Figure 5 . The main pipe 120 is provided on one side of the distortion pipeline 12 and is connected to the branch pipes 121.

[0063] Further, as shown in Figure 4 , air outlet holes 123 are distributed on both the main pipe 120 and the branch pipes 121, and the diameter of the air outlet holes 123 decreases along the extension direction of the branch pipes 121.

[0064] Specifically, in this embodiment, the diameter of the air outlet holes 123 provided on the main pipe 120 is 4 mm, and the diameters of the air outlet holes 123 extending on the branch pipes 121 are 3.5 mm, 3 mm, and 2.5 mm respectively. In other embodiments, the diameter of the air outlet holes 123 provided on the main pipe 120 can be adjusted to 3 mm or 5 mm according to experimental requirements.

[0065] Preferably, the central axis of the air outlet hole 123 forms an angle of 45° with the axis of the main pipe 120 and the axis of the branch pipe 121 in the distortion plane.

[0066] Further, as shown in Figure 1 the gas pipeline 2 is connected to the distortion device 1, and the inlet of the gas pipeline 2 is connected to the downstream of the gas passage of the specimen, so that the downstream gas can directly enter the gas pipeline 2.

[0067] Further, the gas pipeline 2 includes a first valve 23 and a second valve 24. The first valve 23 controls the downstream gas to enter the gas pipeline 2, and the second valve 24 controls the gas inside the heat exchanger 21 to enter the distortion device 1.

[0068] Further, the gas pipeline 2 includes a pressure gauge 25 and a thermometer 26, and the pressure gauge 25 and the thermometer 26 are arranged on the gas pipeline 22 between the second valve 24 and the heat exchanger 21.

[0069] Further, a part of the gas pipeline 22 of the downstream gas enters the heat exchanger 21, and the gas pipeline 22 contacts the cooling working medium 211 in the heat exchanger 21 for heat exchange.

[0070] Preferably, the cooling working medium 211 inside the heat exchanger 21 is water.

[0071] To achieve the above object, the present invention also proposes a distortion gas test method, which uses a distortion gas test device according to the above, and includes the following steps:

[0072] S1: Place the distortion device 1 inside the air flow passage of the specimen;

[0073] S2: Open the gas pipeline 2 to allow the downstream gas of the air flow passage of the specimen to enter the heat exchanger 21;

[0074] S3: When the temperature and pressure of the gas inside the heat exchanger meet the test requirements, introduce the gas into the distortion device 1.

[0075] Further, in the step S2, it includes:

[0076] Close the second valve 24 and open the first valve 23 to allow the downstream gas of the air flow passage of the specimen to enter the heat exchanger.

[0077] Further, in the step S2, it also includes:

[0078] Inject the cooling working medium 211 into the heat exchanger 21, adjust the total temperature of the distortion gas, and adjust the total pressure of the distortion gas by adjusting the opening degree of the first valve 23.

[0079] Further, in the step S2, it also includes:

[0080] Measure the temperature and pressure inside the heat exchanger 21 through the pressure gauge 25 and the thermometer 26. If the preset value is reached, open the second valve 24.

[0081] In summary, as can be seen from the above description, the above embodiments of the present invention achieve the following technical effects:

[0082] 1. The present invention provides a distorted gas test device and method. By connecting the gas pipeline to the downstream of the specimen and passing the gas through the distortion device after pretreatment, no additional gas source supply is required, simplifying the experimental device and reducing costs. At the same time, the required total temperature and total pressure distorted gas can be quickly generated, greatly improving the experimental preparation efficiency. The present invention can be customized according to the CFD calculation results or experimental requirements. Not only can the arrangement of the distortion pipelines of the distortion device be adjusted, but the arrangement methods (uniform or non-uniform) and angles of the branch pipes and outlet holes can also be flexibly adjusted to adapt to various working conditions and meet complex experimental requirements.

[0083] 2. The present invention provides a distorted gas test device and method, which integrates the functions of total temperature, total pressure distortion and swirl. It solves the problem that the prior art cannot simulate total temperature and total pressure distortion simultaneously, filling the technical gap. This innovative design makes the experimental device more compact and efficient, reducing the complexity and cost of experimental equipment. By adjusting the geometric parameters of the branch pipes and outlet holes, the present invention can accurately simulate total temperature and total pressure distortions with different intensities and distributions, improving the experimental accuracy. The angle of the outlet holes can be set according to the test requirements to generate swirls in different directions, providing diverse experimental conditions for studying complex flow fields. This precise simulation ability makes the experimental results more reliable and helps to deeply study the aerodynamic performance and stability of gas turbine compressors.

[0084] 3. The present invention provides a distorted gas test device and method, which integrates functions such as air extraction, adjustment, and distribution, reducing the complexity of the experimental device and the installation and commissioning time. Through the rapid adjustment of valves and heat exchangers, different experimental conditions can be quickly switched, improving the experimental efficiency. This simplified design makes the experimental operation more convenient, reduces the time for experimental preparation and adjustment, and improves the overall experimental efficiency. By using the high-temperature and high-pressure gas at the outlet of the compressor, no additional equipment is required, reducing the equipment procurement and operation costs. At the same time, the device of the present invention has a simple design, low maintenance cost, and long service life, meeting the requirements of sustainable development, reducing the research cost, improving the resource utilization rate, and having significant economic benefits and sustainability.

[0085] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0086] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0087] It should be noted that in the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A distorted gas test device, characterized in that: The invention comprises a distortion device (1) and a gas pipeline (2), wherein the distortion device (1) comprises a plurality of distortion pipelines (12), wherein the distortion pipelines (12) are connected to the gas pipeline (2), wherein the distortion pipeline (12) comprises a main pipe (120) and a plurality of branch pipes (121), wherein the main pipe (120) is connected to the plurality of branch pipes (121), wherein the plurality of branch pipes (121) of the plurality of distortion pipelines (12) form a plurality of ring structures, and the gas pipeline (2) comprises a heat exchanger (21).

2. The device according to claim 1, characterized in that: The distortion device (1) further comprises a hub (11) and a casing (13), The wheel hub (11) and the casing (13) are annular structures, and the wheel hub (11) is arranged inside the casing (13).

3. The device according to claim 2, characterized in that: The distortion pipeline (12) is arranged between the wheel hub (11) and the casing (13).

4. The device according to claim 3, characterized in that: The lengths of the branch pipes (121) are arranged to increase gradually along the extension direction of the main pipe (120).

5. The device according to claim 4, characterized in that: The middle portion of the branch pipe (121) is connected to the main pipe (120), and the branch pipe (121) is symmetrically arranged on both sides of the main pipe (120).

6. The device according to claim 5, characterized in that: The branch pipe (121) with the shortest length in the distortion pipeline (12) is fixed to the wheel hub (11); The longest branch pipe (121) in the distortion pipeline (12) is fixed to the casing (13).

7. The device according to claim 1, characterized in that: The distortion pipeline (12) comprises an air intake pipe (122), The air inlet pipe (122) is in communication with the gas pipeline (2).

8. The device according to claim 1, characterized in that: The distortion pipeline (12) comprises an air outlet (123), The air outlet (123) is arranged on the main pipe (120) and the branch pipe (121).

9. The device according to claim 8, characterized in that: The diameter of the air outlet hole (123) ranges from 2 mm to 5 mm.

10. The device according to claim 9, characterized in that: The diameter of the air outlet hole (123) is arranged to decrease gradually along the extension direction of the branch pipe (121), the closer the air outlet hole (123) is to the main pipe (120), the larger the diameter is, and the range of each decrease of the diameter of the air outlet hole (123) is 1 mm-2 mm.

11. The device according to claim 9, characterized in that: The axis of the main pipe (120) and the axis of the branch pipe (121) form a distortion plane, and the angle formed between the central axis of the air outlet (123) and the distortion plane is in the range of 30°-60°.

12. The device according to claim 1, characterized in that: The heat exchanger (21) comprises a cooling medium (211), The cooling medium (211) includes water, ethanol or mineral oil.

13. The device according to claim 1, characterized in that: The gas pipeline (2) comprises a gas delivery pipe (22), The gas delivery pipe (22) connects the downstream gas of the gas flow channel of the test piece with the distortion device (1).

14. The device according to claim 13, characterized in that: A portion of the gas delivery pipe (22) is disposed inside the heat exchanger (21).

15. A test method using the distorted gas test device as claimed in claims 1 to 14, characterized in that: include: S1: placing the distortion device (1) inside the air flow channel of the test piece; S2: opening the gas pipeline (2) to allow the downstream gas of the gas flow channel of the test piece to enter the heat exchanger (21); S3: When the temperature and pressure of the gas inside the heat exchanger meet the test requirements, the gas is passed into the distortion device (1).

16. The method according to claim 15, characterized in that: In the step S2, it includes: The second valve (24) is closed and the first valve (23) is opened to allow the downstream gas of the gas flow channel of the test piece to enter the heat exchanger.

17. The method according to claim 15, characterized in that: In the step S2, it also includes: A cooling medium (211) is injected into the heat exchanger (21) to adjust the total temperature of the distorted gas, and the total pressure of the distorted gas is adjusted by adjusting the opening of the first valve (23).

18. The method according to claim 15, characterized in that: In the step S2, it also includes: The internal temperature and pressure of the heat exchanger (21) are measured by a pressure gauge (25) and a thermometer (26). If the temperature and pressure reach a preset value, the second valve (24) is opened.

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