Frequency domain adaptive region integration algorithm for aerodynamic noise sources and its application in wind tunnel tests

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (19) : 162-171.

ZHAO Jiaxi, ZHANG Rongping, ZHANG Junlong, LI Zhengchu, SONG Yubao

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Abstract

Source region integration algorithm is an effective method to obtain aeroacoustics characteristics of aircraft components in wind tunnel test. The integration region of the traditional algorithm is fixed, but the aerodynamic noise distribution characteristics of airframe noise change with frequency, which will lead to error in the integration results. In order to improve the accuracy of dynamic source integration result, frequency domain adaptive integration algorithm based on CLEAN-SC is proposed, the core idea is to discretize the source integration region, and optimize the integration region adaptively according to the strongest source position in the sub-region obtained by CLEAN-SC algorithm. Through simulation and wind tunnel test data analysis, the frequency domain adaptive integration algorithm can get more accurate integration results, and is better to dynamic acoustic source like airframe noise.

Key words

aeroacoustics / wind tunnel test / source region integration / airframe noise

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ZHAO Jiaxi, ZHANG Rongping, ZHANG Junlong, LI Zhengchu, SONG Yubao. Frequency domain adaptive region integration algorithm for aerodynamic noise sources and its application in wind tunnel tests[J]. Journal of Vibration and Shock, 2023, 42(19): 162-171

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