Volume 29 Issue 5
May  2014
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CHEN Xin, WANG Huai-yu, GAO Chang-feng, ZHANG Wu, XIE Chen. Effect of rearview mirror edge structure on flow field and aerodynamic noise[J]. Journal of Aerospace Power, 2014, (5): 1099-1104.
Citation: CHEN Xin, WANG Huai-yu, GAO Chang-feng, ZHANG Wu, XIE Chen. Effect of rearview mirror edge structure on flow field and aerodynamic noise[J]. Journal of Aerospace Power, 2014, (5): 1099-1104.

Effect of rearview mirror edge structure on flow field and aerodynamic noise

  • Received Date: 2013-09-06
  • Publish Date: 2014-05-28
  • Numerical simulation of exterior flow field and aerodynamic noise caused by different rearview mirror edge structures was conducted by the large eddy simulation(LES). The results show that various mirror cover edge structures have an effect on the airflow velocity and direction, affecting greatly the rear flow field of rearview mirror and sound pressure level at monitoring point. Compared with the original model, the vortex flow behind model 1 is farther away from the body surface, helping to reduce aerodynamic noise. Sound pressure level drops by almost 10dB in 1/3 octave center frequency at a monitoring point. The vortex flow behind model 2 is separated and located nearer to the body surface, leading to rise of aerodynamic noise. The mirror cover edge structure of model 1 improves the flow field and aerodynamic noise around the rearview mirror and A-pillar.

     

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