Effects of tube system and data correction for fluctuating pressure test in wind tunnel |
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Authors: | Xue WANG Xunnian WANG Xiaobo REN Xiwei YIN Weihua WANG |
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Institution: | 1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;2. Low Speed Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China |
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Abstract: | The accuracy of fluctuating pressure test in wind tunnel is affected by the tube system. By employing contradistinctive experimental method, systematic study was conducted to investigate the effects of the tube system on fluctuating pressure. The analyzed tube system parameters include tube length, inside diameter, curvature, deflection angle, thickness, material, restrictor length, restrictor inside diameter, and restrictor place. It is found that all the tube system parameters mentioned above except tube curvature have non-negligible effects on fluctuating pressure. Based on the research results, test methods were presented for the fluctuating pressure measurement in low-speed wind tunnel, which can obviously improve the data accuracy but not lose test efficiency. The effectiveness of the method is verified by the wind tunnel test. |
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Keywords: | Data correction Fluctuating pressure Frequency response function Tube system Wind tunnel test |
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