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Experimental and numerical investigations of the aerodynamic noise reduction of automotive side view mirrors 被引量:2

Experimental and numerical investigations of the aerodynamic noise reduction of automotive side view mirrors
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摘要 This paper studies the aeroacoustics of the side view mirrors by wind tunnel tests and numerical simulations. The mirror is placed on a table in the wind tunnel test. Based on the experiment results, a numerical analysis model is established to analyze the acoustic field in the wake of the side view mirror by the Large Eddy Simulation(LES). The flow field and the noise level of two different side view mirrors are compared in the simulation. It is shown that, with the serration structures applied onto the mirror surface, the turbulence zone and the pressure fluctuation in the wake of the bionic model are improved effectively, which helps its flow control and noise reduction. Meanwhile, as is shown in the noise spectra, when the noise frequency is over 500 Hz, for the bionic mode, the noise is reduced to a lower level than with the original one, which further shows its effectiveness in the noise reduction. This paper studies the aeroacoustics of the side view mirrors by wind tunnel tests and numerical simulations. The mirror is placed on a table in the wind tunnel test. Based on the experiment results, a numerical analysis model is established to analyze the acoustic field in the wake of the side view mirror by the Large Eddy Simulation(LES). The flow field and the noise level of two different side view mirrors are compared in the simulation. It is shown that, with the serration structures applied onto the mirror surface, the turbulence zone and the pressure fluctuation in the wake of the bionic model are improved effectively, which helps its flow control and noise reduction. Meanwhile, as is shown in the noise spectra, when the noise frequency is over 500 Hz, for the bionic mode, the noise is reduced to a lower level than with the original one, which further shows its effectiveness in the noise reduction.
出处 《Journal of Hydrodynamics》 SCIE EI CSCD 2018年第4期642-650,共9页 水动力学研究与进展B辑(英文版)
基金 Project supported by the State’s Key Project of Research and Development Plan of China(Grant No.2016YFB0101601-7) the Special planning project of Jilin Province(Grant No.SXGJSF2017-2-1-5) the Science and Technology Develop-ment Project of Jilin Province(Grant No.20160101283JC)
关键词 Aerodynamic noise side view mirror flow field acoustic field BIONIC noise reduction Aerodynamic noise side view mirror flow field acoustic field bionic noise reduction
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