Comparative Study on External Flow Simulation of Passenger Car with Complex Underbody and Flat Underbody

Abstract:

In this paper, the external flow simulation has been carried out on a simplified passenger car model with two schemes adopted: a smoothed complex underbody and a flat underbody. The aerodynamic characteristics and the flow field structure of the passenger car model were obtained with CFD method, and the drag coefficients of the smoothed complex underbody and the flat underbody are respectively 0.275 and 0.251. According to the simulation, flow separation and energy loss of fluid was caused by protuberances on the complex underbody. As there are many differences between the aerodynamic characteristics of the smoothed underbody and the flat one, its suggested to use a smoothed complex underbody not a flat underbody in the studying of aerodynamic drag reduction of a passenger car.

• Periodical: Applied Mechanics and Materials (Volumes 380-384)
• Pages: 69-72
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.380-384.69
• Online since: August 2013
• Authors: Xu Yan, Xin Qiao, Zhi Ming Zhao, Jian Ye, Lei Liao, Xing Jun Hu, Jing Yu Wang
• Keywords: Automobile Aerodynamics, Comparative Study, Complex Underbody, Computational Fluid Dynamics (CFD), External Flow

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