A turbine guide vane air flow test fixture and method

Abstract

This invention relates to a test fixture and method for testing the airflow of a turbine guide vane. The fixture includes an inlet side and an outlet side, which are connected to form a clamping groove. The inlet side includes an outer inlet ring and an inner inlet ring, and the outlet side includes an outer outlet ring and an inner outlet ring. The end of the outer inlet ring furthest from the outer outlet ring is inclined towards the axis of the outer inlet ring, and the end of the outer inlet ring closest to the outer outlet ring has a rounded corner on its inner sidewall. The sidewall of the inner inlet ring furthest from the outer outlet ring is conical, and the apex of the conical sidewall of the inner inlet ring has a rounded corner, as does the end of the conical sidewall furthest from its apex. The fixture in this design minimizes air pressure and flow loss during airflow testing of the turbine guide vane, thus reducing measurement errors in the test results to a minimum.

Description

Technical Field

[0001] This invention relates to the field of turbine guide vane airflow testing technology, specifically to a turbine guide vane airflow testing fixture and testing method. Background Technology

[0002] The throat area of ​​a turbine guide vane is a crucial parameter in the design and production of gas turbine engines. Its size directly affects the temperature before and after the turbine stage, the airflow field, and the engine's flow rate, thrust, speed, and fuel consumption, making it a key parameter determining overall engine performance. Currently, the throat area of ​​a turbine guide vane is primarily measured by testing its airflow capacity. While existing turbine guide vane airflow capacity testing equipment can measure the airflow area, the accompanying fixtures obstruct airflow during measurement, increasing air pressure and flow loss, and consequently increasing measurement errors. Summary of the Invention

[0003] This invention addresses the problem in existing turbine guide vane airflow capacity testing equipment where the fixture obstructs airflow, increasing air pressure and flow loss during measurement and thus increasing measurement error. The invention provides a turbine guide vane airflow testing fixture. This fixture reduces air pressure and flow loss caused by the fixture during turbine guide vane airflow testing, thereby minimizing measurement error. Furthermore, this invention provides a turbine guide vane airflow testing method capable of measuring the flow area of ​​the turbine guide vane.

[0004] The technical solution adopted in this invention is: a turbine guide air flow test fixture, including an intake side and an exhaust side that are detachably connected. After the intake side and the exhaust side are connected, a clamping groove for fixing the turbine guide is formed at the end face where the two are connected. The intake side includes an intake outer ring and an intake inner ring located in the inner cavity of the intake outer ring. The exhaust side includes an exhaust outer ring and an exhaust inner ring located in the inner cavity of the exhaust outer ring. The intake outer ring and the exhaust outer ring are detachably connected, and the intake inner ring and the exhaust inner ring are detachably connected. The end of the intake outer ring away from the exhaust outer ring is inclined towards the axis of the intake outer ring, with an inclination angle α of 26°-45°. The end of the intake outer ring near the exhaust outer ring has a rounded corner a with a radius of 40mm-60mm on its inner sidewall. The sidewall of the intake inner ring away from the exhaust inner ring is conical, with an angle β between its sidewall and the axis of the intake inner ring of 38°-50°. The apex of the conical sidewall of the intake inner ring has a rounded corner b with a radius of 30mm-40mm, and the end of the conical sidewall away from its apex has a rounded corner c with a radius of 35mm-50mm.

[0005] In this design, the inner intake ring of the clamp is tapered near the intake end, and the outer intake ring is inclined towards the axis of the outer intake ring at the end away from the exhaust ring. This can increase the intake area of ​​the clamp's intake end. The inclined sidewall increases the intake area, but the inclined gas flow channel sidewall will lose air pressure when the airflow enters the turbine guide through the clamp. To ensure the accuracy of the test results, it is necessary to minimize the air pressure loss in the intake duct. The CFD (Computational Fluid Dynamics) method was used to simulate the airflow inside the fixture and turbine guide. The simulation results show that, with other conditions unchanged, the air pressure loss is minimized when the angle β between the sidewall of the inner intake ring furthest from the exhaust inner ring and the axis of the inner intake ring is closer to 38°. However, when the angle exceeds 50°, a large separation zone appears in the test section regardless of the adjustment of other parameters, which is detrimental to aerodynamic performance. Similarly, the air pressure loss is minimized when the angle α between the outer intake ring furthest from the exhaust outer ring and the axis of the outer intake ring is closer to 26°. However, when the angle exceeds 45°, a large separation zone appears in the test section regardless of the adjustment of other parameters. When the inner wall of the intake outer ring, near the exhaust outer ring, has a rounded corner a with a radius of 40mm-60mm, and the apex of the conical sidewall of the intake inner ring has a rounded corner b with a radius of 30mm-40mm, and the end of the conical sidewall furthest from its apex has a rounded corner c with a radius of 35mm-50mm, the air pressure loss is minimized. The specific dimensions of the chamfers can be determined within this range based on the dimensions of the fixture.

[0006] The fixture in this design minimizes air pressure and flow loss during airflow testing of the turbine guide vane, thus reducing measurement errors in the test results to the greatest extent possible.

[0007] Preferably, the clamping groove includes an inner ring fixing groove formed between the inner intake ring and the inner exhaust ring, and an outer ring fixing groove formed between the outer intake ring and the outer exhaust ring. The inner ring fixing groove is used to engage the inner ring of the turbine guide, and the outer ring fixing groove is used to engage the outer ring of the turbine guide. Gaskets are provided on both side walls of the inner ring fixing groove and the outer ring fixing groove. The inner and outer rings of the turbine guide can be fixed separately through the inner and outer ring fixing grooves, resulting in better positioning and clamping of the turbine guide by the clamp. The gaskets also seal the gap between the turbine guide and the clamp, further enhancing the seal between them and reducing flow loss during airflow testing. The gaskets are made of silicone rubber, which has excellent high-temperature resistance. When airflow testing of the turbine guide is required under high-temperature conditions, the gaskets will not deform due to heat, maintaining a good seal between the turbine guide and the clamp.

[0008] Preferably, the system also includes locking bolts and locking nuts. The outer wall of the intake outer ring has an intake skirt with a first through hole, and the outer wall of the exhaust outer ring has an exhaust skirt with a second through hole. When the intake and exhaust outer rings are connected, the first and second through holes are coaxial. The locking bolt passes through the first and second through holes and is threadedly connected to the locking nut. There are several first through holes, equidistantly distributed in a circle around the axis of the intake outer ring. There are also several second through holes, locking bolts, and locking nuts, ensuring that each first through hole corresponds to one second through hole, one locking bolt, and one locking nut. The intake and exhaust outer rings are connected by bolts, a simple and convenient connection method that facilitates disassembly. The presence of multiple bolts further increases the connection strength between the intake and exhaust outer rings.

[0009] Preferably, a sealing ring is also included. When the intake outer ring and the exhaust outer ring are connected, the outer wall of the intake outer ring abuts against the inner wall of the exhaust outer ring. A groove is provided on the outer wall of the intake outer ring, and the sealing ring is located in the groove. The sealing ring also abuts against the inner wall of the exhaust outer ring. After the sealing ring is installed, it can eliminate the radial gap between the intake outer ring and the exhaust outer ring, ensuring no air leakage and further improving the sealing performance of the fixture.

[0010] Preferably, the device also includes a positioning bolt. A positioning hole, coinciding with the axis of the intake inner ring, is located at the inner cavity of the conical end of the intake inner ring. A third through hole is provided on the exhaust inner ring. The positioning bolt passes through the third through hole and is threadedly connected to the positioning hole. The intake inner ring and the exhaust inner ring are connected by bolts, a simple and convenient connection method.

[0011] Preferably, the outer wall of the exhaust inner ring, at the end furthest from the intake inner ring, has a rounded corner d with a radius of 15mm-20mm. The intake inner ring, intake outer ring, exhaust inner ring, and exhaust outer ring are all made of LY11 and have undergone surface anodizing treatment. A rounded corner is provided on the end of the exhaust inner ring near the turbine guide vane to facilitate the guidance of air entering the turbine guide vane. The LY11 material of the intake inner ring, intake outer ring, exhaust inner ring, and exhaust outer ring possesses good strength, elongation, and toughness, and after surface anodizing treatment, it can effectively resist corrosion and wear.

[0012] A method for testing the airflow of a turbine guide vane includes the following steps:

[0013] Step 1: Debug the airflow tester and install the fixture:

[0014] Preheat the air flow tester, install the calibration orifice plate on the air flow tester and start the air flow tester to begin measurement. If the measurement result of the calibration orifice plate is within its calibration range, it means that the equipment and environment meet the test requirements and the test continues; if the measurement result of the calibration orifice plate is not within its calibration range, it means that the equipment and environment do not meet the test requirements and the test is terminated.

[0015] If the equipment and environment meet the testing requirements, install the fixture on the air flow tester, install the calibration sample on the fixture, start the air flow tester, and calibrate the fixture using the calibration sample. If the test result of the calibration sample is within its calibration error range, it means that the fixture meets the test requirements, and the test continues. Install the measuring part on the fixture. If the test result of the calibration sample is not within its calibration error range, it means that the fixture is damaged, and the test is terminated.

[0016] Step 2: Measure the effective channel cross-section of the part:

[0017] Start the airflow tester to conduct an airflow test on the turbine guide vane and obtain the test results;

[0018] Step 3: Check the validity of the data:

[0019] Compare the test results with the standard value. If the difference is less than 0.5%, the test results are valid. If the difference is greater than 0.5%, the test data are invalid.

[0020] Step 4: Save the measurement results:

[0021] Save the valid test results.

[0022] The method in this solution can measure the flow area of ​​the turbine guide, providing technical support for the manufacturing of the turbine guide.

[0023] Preferably, in step one, the measurement result of the orifice plate has an error range of ±0.5% compared with the standard value on its surface. The purpose of calibrating the orifice plate and the calibration sample is to check whether the test conditions meet the standard; the test error is minimized only when the test conditions meet the standard.

[0024] Preferably, in step two, multiple airflow tests are performed on the turbine guide vane, and the average value of the test results is taken. Taking the average value of multiple measurements can further improve the accuracy of the measurement results and reduce test errors.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The turbine guide vane airflow test fixture and method in this solution minimize air pressure and flow loss caused by the fixture when conducting airflow tests on turbine guide vanes, thus reducing test result errors caused by the fixture. First, the airflow tester and fixture are calibrated using a calibration orifice plate and calibration sample. Then, multiple measurements are taken and the average value is calculated when measuring the parts to reduce errors, further improving the accuracy of the test results. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of a turbine guide airflow test fixture according to the present invention;

[0027] Figure 2 This invention relates to a turbine guide vane airflow test fixture. Figure 1 Enlarged view of part A in the image;

[0028] Figure 3 This is a cross-sectional view of the working state of a turbine guide airflow test fixture according to the present invention;

[0029] Figure 4 This is a cross-sectional view of the air intake outer ring of a turbine guide air flow test fixture according to the present invention;

[0030] Figure 5 This is a cross-sectional view of the inner air intake ring of a turbine guide airflow test fixture according to the present invention.

[0031] Figure 6 This is a cross-sectional view of the exhaust outer ring of a turbine guide airflow test fixture according to the present invention;

[0032] Figure 7 This is a cross-sectional view of the exhaust inner ring of a turbine guide airflow test fixture according to the present invention;

[0033] Figure 8 This is a flowchart of a turbine guide airflow test method according to the present invention. Detailed Implementation

[0034] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0035] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar parts. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] The technical solution of the present invention will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0037] Example 1

[0038] like Figures 1-7 The illustration shows an embodiment 1 of a turbine guide airflow test fixture, which includes a detachably connected air intake side and an exhaust side. After the air intake side and the exhaust side are connected, a clamping groove 5 for fixing the turbine guide is formed at the end face where the two are connected. The air intake side includes an air intake outer ring 1 and an air intake inner ring 2 located in the inner cavity of the air intake outer ring 1. The exhaust side includes an exhaust outer ring 3 and an exhaust inner ring 4 located in the inner cavity of the exhaust outer ring 3. The air intake outer ring 1 and the exhaust outer ring 3 are detachably connected, and the air intake inner ring 2 and the exhaust inner ring 4 are detachably connected. The end of the intake outer ring 1 away from the exhaust outer ring 3 is inclined towards the axis of the intake outer ring 1, with an inclination angle α of 26°. The end of the intake outer ring 1 near the exhaust outer ring 3 has a rounded corner a with a radius of 50mm on its inner sidewall. The sidewall of the intake inner ring 2 away from the exhaust inner ring 4 is conical, and the angle β between its sidewall and the axis of the intake inner ring 2 is 38°. The apex of the conical sidewall of the intake inner ring 2 has a rounded corner b with a radius of 50mm, and the end of the conical sidewall away from its apex has a rounded corner c with a radius of 50mm.

[0039] The working principle or process of this embodiment is as follows: In this scheme, the inner intake ring 2 of the clamp is conical near the intake end of the clamp, and the end of the outer intake ring 1 away from the exhaust outer ring 3 is inclined towards the axis of the outer intake ring 1, which can increase the intake area of ​​the clamp's intake end. The inclined sidewall increases the intake area, but when the airflow enters the turbine guide through the clamp, the inclined gas flow channel sidewall will lose air pressure. When the angle β between the sidewall of the inner intake ring 2 away from the exhaust inner ring 4 and the axis of the inner intake ring 2 is 38°, the air pressure loss is minimal; when the angle α of the outer intake ring 1 away from the exhaust outer ring 3 inclined towards the axis of the outer intake ring 1 is 26°, the air pressure loss is minimal.

[0040] The beneficial effects of this embodiment are: the fixture in this solution causes the least loss of air pressure and flow when conducting air flow tests on turbine guide vanes, thus minimizing the measurement error of the test results.

[0041] Example 2

[0042] Example 2 of a valve core with a sensor core installed, such as Figures 1-7 As shown, the structure of the fixture is further defined based on Embodiment 1.

[0043] Specifically, the clamping groove 5 includes an inner ring fixing groove 501 formed between the inner intake ring 2 and the inner exhaust ring 4, and an outer ring fixing groove 502 formed between the outer intake ring 1 and the outer exhaust ring 3. The inner ring fixing groove is used to engage the inner ring of the turbine guide, and the outer ring fixing groove 502 is used to engage the outer ring of the turbine guide. Both side walls of the inner ring fixing groove 501 and the two side walls of the outer ring fixing groove 502 are provided with washers 7.

[0044] Specifically, it also includes locking bolts 6 and locking nuts. An intake skirt 101 is provided on the outer wall of the intake outer ring 1, and a first through hole 111 is provided on the intake skirt 101. An exhaust skirt 301 is provided on the outer wall of the exhaust outer ring 3, and a second through hole 311 is provided on the exhaust skirt 301. When the intake outer ring 1 and the exhaust outer ring 3 are connected, the first through hole 111 and the second through hole 311 are coaxial. The locking bolt 6 passes through the first through hole 111 and the second through hole 311 and is threadedly connected to the locking nut. There are four first through holes 111, which are equidistantly distributed in a circle around the axis of the intake outer ring 1. There are also four second through holes 311, four locking bolts 6, and four locking nuts, so that each first through hole 111 corresponds to one second through hole 311, one locking bolt 6, and one locking nut.

[0045] Specifically, it also includes a sealing ring 8. When the intake outer ring 1 is connected to the exhaust outer ring 3, the outer side wall of the intake outer ring 1 abuts against the inner side wall of the exhaust outer ring 3. The outer side wall of the intake outer ring 1 is provided with a groove 102, and the sealing ring 8 is located in the groove 102. The sealing ring 8 also abuts against the inner side wall of the exhaust outer ring 3.

[0046] Specifically, it also includes a positioning bolt 9, a positioning hole 201 that coincides with the axis of the inner cavity of the conical end of the inner intake ring 2, and a third through hole 401 on the inner exhaust ring 4. The positioning bolt 9 passes through the third through hole 401 and is threadedly connected to the positioning hole 201.

[0047] Specifically, the outer wall of the exhaust inner ring 4, at the end furthest from the intake inner ring 2, has a rounded corner d with a radius of 15mm-20mm. The intake inner ring 2, intake outer ring 1, exhaust inner ring 4, and exhaust outer ring 3 are all made of LY11 and have undergone surface anodizing treatment.

[0048] The beneficial effects of this embodiment are as follows: The inner and outer rings of the turbine guide can be fixed separately through the inner ring fixing groove 501 and the outer ring fixing groove, resulting in better positioning and clamping of the turbine guide by the fixture. The addition of gasket 7 blocks the gap between the turbine guide and the fixture, further enhancing the seal between them and reducing flow loss during airflow testing. Gasket 7 is made of silicone rubber, which has excellent high-temperature resistance. When airflow testing of the turbine guide is required under high-temperature conditions, gasket 7 will not deform due to heat, maintaining a good seal between the turbine guide and the fixture. The intake outer ring 1 and the exhaust outer ring 3 are connected by bolts, a simple and convenient connection method that facilitates disassembly. Four bolts further increase the connection strength between the intake outer ring 1 and the exhaust outer ring 3. The sealing ring 8 eliminates the radial gap between the intake outer ring 1 and the exhaust outer ring 3, ensuring no air leakage and further improving the sealing performance of the fixture. The intake inner ring 2 and the exhaust inner ring 4 are connected by bolts, a simple and convenient connection method. The intake inner ring 2, intake outer ring 1, exhaust inner ring 4 and exhaust outer ring 3 are all made of LY11, which has good strength, elongation and toughness, and can resist corrosion and wear well after surface anodizing treatment.

[0049] Example 3

[0050] A method for testing the airflow of a turbine guide vane, such as Figure 8 As shown, it includes the following steps:

[0051] Step 1: Debug the airflow tester and install the fixture:

[0052] Preheat the air flow tester, install the calibration orifice plate on the air flow tester and start the air flow tester to begin measurement. If the measurement result of the calibration orifice plate is within its calibration range, continue the test. Install the fixture on the air flow tester, install the calibration sample on the fixture, start the air flow tester, calibrate the fixture using the calibration sample, and if the test result of the calibration sample is within its calibration error range, install the measuring part on the fixture.

[0053] Step 3: Check the validity of the data:

[0054] Compare the test results with the standard value. If the difference is less than 0.5%, the test results are valid. If the difference is greater than 0.5%, the test data are invalid.

[0055] Step 4: Save the measurement results:

[0056] Save the valid test results.

[0057] Specifically, in step one, the measurement result of the orifice plate has an error range of ±0.5% compared with the standard value on its surface. If the error is greater than this range, the clamp is considered damaged. In step two, the average value of the three measurements is taken.

[0058] The beneficial effects of this embodiment are as follows: The method in this scheme can measure the flow area of ​​the turbine guide, providing technical support for the manufacturing of the turbine guide. The purpose of orifice plate calibration is to detect the stability of the part on the corresponding tooling; qualified calibration means that the fixture is intact and the test results are stable. Taking the average of three measurements can further improve the accuracy of the measurement results and reduce test errors.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A turbine guide vane airflow test fixture, characterized in that, The device includes a detachably connected intake side and an exhaust side. After the intake side and the exhaust side are connected, a clamping groove (5) for fixing the turbine guide is formed at the end face where the two are connected. The intake side includes an intake outer ring (1) and an intake inner ring (2) located in the inner cavity of the intake outer ring (1). The exhaust side includes an exhaust outer ring (3) and an exhaust inner ring (4) located in the inner cavity of the exhaust outer ring (3). The intake outer ring (1) and the exhaust outer ring (3) are detachably connected, and the intake inner ring (2) and the exhaust inner ring (4) are detachably connected. The end of the intake outer ring (1) away from the exhaust outer ring (3) is inclined toward the axis of the intake outer ring (1) with an inclination angle α of 26°-45°. The end of the intake outer ring (1) close to the exhaust outer ring (3) has a rounded corner a with a radius of 40mm-60mm on its inner sidewall. The sidewall of the inner intake ring (2) away from the inner exhaust ring (4) is tapered, and the angle between the sidewall and the axis of the inner intake ring (2) is β38°-50°. The tapered sidewall of the inner intake ring (2) has a rounded corner b with a radius of 30mm-40mm at its apex, and the tapered sidewall away from its apex has a rounded corner c with a radius of 35mm-50mm. The clamping groove (5) includes an inner ring fixing groove (501) formed between the inner intake ring (2) and the inner exhaust ring (4) and an outer ring fixing groove (502) formed between the outer intake ring (1) and the outer exhaust ring (3). The inner ring fixing groove (501) is used to engage the inner ring of the turbine guide, and the outer ring fixing groove (502) is used to engage the outer ring of the turbine guide. Both side walls of the inner ring fixing groove (501) and the two side walls of the outer ring fixing groove (502) are provided with washers (7).

2. The turbine guide vane airflow test fixture according to claim 1, characterized in that, It also includes a locking bolt (6) and a locking nut. The outer wall of the intake outer ring (1) is provided with an intake skirt (101) and a first through hole (111) is provided on the intake skirt (101). The outer wall of the exhaust outer ring (3) is provided with an exhaust skirt (301) and a second through hole (311) is provided on the exhaust skirt (301). When the intake outer ring (1) is connected to the exhaust outer ring (3), the first through hole (111) and the second through hole (311) are coaxial. The locking bolt (6) passes through the first through hole (111) and the second through hole (311) and is threadedly connected to the locking nut.

3. The turbine guide vane airflow test fixture according to claim 2, characterized in that, It also includes a sealing ring (8). When the intake outer ring (1) is connected to the exhaust outer ring (3), the outer side wall of the intake outer ring (1) abuts against the inner side wall of the exhaust outer ring (3). The outer side wall of the intake outer ring (1) is provided with a groove (102). The sealing ring (8) is located in the groove (102). The sealing ring (8) also abuts against the inner side wall of the exhaust outer ring (3).

4. The turbine guide vane airflow test fixture according to claim 1, characterized in that, It also includes a positioning bolt (9), and a positioning hole (201) is provided at the inner cavity axis of the conical end of the inner air intake ring (2) that coincides with the axis of the inner air intake ring (2). A third through hole (401) is provided on the inner exhaust ring (4). The positioning bolt (9) passes through the third through hole (401) and is threadedly connected to the positioning hole (201).

5. A turbine guide vane airflow test fixture according to claim 1, characterized in that, The outer wall of the exhaust inner ring (4) at the end away from the intake inner ring (2) is provided with a rounded corner d with a radius of 15mm-20mm.

6. The turbine guide vane airflow test fixture according to claim 1, characterized in that, The inner intake ring (2), the outer intake ring (1), the inner exhaust ring (4), and the outer exhaust ring (3) are all made of Ly11 and have undergone surface anodizing treatment.

7. A method for testing the airflow of a turbine guide vane, characterized in that, The turbine guide vane airflow test fixture, as described in any one of claims 1-6, comprises the following steps: Step 1: Debug the airflow tester and install the fixture: Preheat the air flow tester, calibrate the air flow tester using a calibration orifice plate, install the fixture after the calibration is qualified, calibrate the fixture using a calibration sample, and if the measurement result of the calibration sample is within the error range of its calibrated value, the calibration is qualified, and install the part on the fixture; Step 2: Measure the effective channel cross-section of the part: Start the airflow tester to conduct an airflow test on the turbine guide vane and obtain the test results; Step 3: Check the validity of the data: Compare the test results with the standard value. If the difference is less than 0.5%, the test results are valid. If the difference is greater than 0.5%, the test data are invalid. Step 4: Save the measurement results: Save the valid test results.

8. The method for testing the airflow of a turbine guide vane according to claim 7, characterized in that, In step one, the measurement result of the calibration sample has an error range of ±0.5% compared with its calibration value.

9. The method for testing the airflow of a turbine guide vane according to claim 7, characterized in that, In step two, multiple airflow tests are conducted on the turbine guide vane, and the average value of the test results is taken.

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