Study on varying dynamic pressure control of flow field in 2m supersonic wind tunnel

Zhou Bo; Gao Chuan; Yang Yang

doi:10.11729/syltlx20180133

Volume 33 Issue 6

Dec. 2019

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Journal of Experiments in Fluid Mechanics > 2019 > 33(6): 72-77. > DOI: 10.11729/syltlx20180133

Zhou Bo, Gao Chuan, Yang Yang. Study on varying dynamic pressure control of flow field in 2m supersonic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2019, 33(6): 72-77. DOI: 10.11729/syltlx20180133

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Study on varying dynamic pressure control of flow field in 2m supersonic wind tunnel

High Speed Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China

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Received Date: September 18, 2018
Revised Date: January 06, 2019

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Abstract

The flutter test requires that the wind tunnel must have the capability of varying dynamic speed pressure. Therefore, the flow field control method was studied in the 2m supersonic wind tunnel. For the problem that the regulating characteristics of the main pressure regulating valve are not consistent when the total pressure is running in a wide range of steps, the method of the total pressure grouping and error segmentation control is adopted to solve the problem. The control method based on the characteristic curve of the main pressure regulating valve is adopted to meet the requirements of adjustable total pressure rise rate, which avoids the process of setting control parameters and requires fewer times of debugging. Test results show that the method can complete multiple total pressure control in a test, the main pressure stable precision reaches 0.3%, the overshoot of the dynamic pressure is less than 0.5kPa, and the total pressure rise rate is adjustable. The 2m supersonic wind tunnel has the capability of varying dynamic speed pressure, and has been successfully applied in the model test.
- supersonic wind tunnel,
- varying dynamic pressure,
- flutter test,
- subsection control,
- valve characteristic curve

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