Journal of Advances in Applied Mathematics

Download PDF (1092.1 KB) PP. 146 - 157 Pub. Date: October 1, 2018

DOI: 10.22606/jaam.2018.34005

• Longcheng Xing^*
  College of Civil Engineering and Architecture, Hebei University, Baoding, China
• Linlin Shen
  College of Civil Engineering and Architecture, Hebei University, Baoding, China
• Xiaodong Pan
  College of Civil Engineering and Architecture, Hebei University, Baoding, China
• Jingbo Zhou
  College of Civil Engineering and Architecture, Hebei University, Baoding, China
• Fuqiang Sun
  College of Civil Engineering and Architecture, Hebei University, Baoding, China

In this paper, the flow field and aerodynamic noise of a simple automotive rearview mirror are analyzed by using Star CCM + software. The external flow field and aerodynamic noise of the rearview mirror are studied by adding a guide bar to the mirror model. The variation of the external flow field and the noise of the rearview mirror are studied by changing the height of the guide bar(3mm,6mm,10mm).The results show that the pressure difference between the windward side and the leeward side of the rearview mirror is an important factor causing the airflow resistance. The location of the surface sound source of the rearview mirror is mainly concentrated in the A-pillar area. The rear-view mirrors with 10mm guide bar weaken the pressure gradient generated by the airflow through the rearview mirror, and the airflow separation and re-attachment are small, which significantly deviates from the support facing the vortex position of the vehicle outflow field, reducing the effect of turbulent pulsating pressure on the support surface, and the pressure pulsation is superior to the other two cases.

Rearview mirror, aerodynamic characteristics, aerodynamic noise

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