Numerical Optimization Research on Rear Characteristic Angles Based on MIRA Model for Aerodynamic Drag Reduction

Qian Qian Du; Xing Jun Hu; Qi Fei Li; Yu Kun Liu; Bo Yang

doi:10.4028/www.scientific.net/AMR.774-776.428

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 774-776Numerical Optimization Research on Rear...

Numerical Optimization Research on Rear Characteristic Angles Based on MIRA Model for Aerodynamic Drag Reduction

Abstract:

The rear characteristic angles of the passenger car in this study were defined as the inclination angle of rear window and the bottom inclination angle of aft based on the MIRA model. The numerical optimization method was used to analyze the influence of combined variation of two angles on the external flow field and the C_D of the passenger car, in which we combined genetic algorithm with the CFD simulation to reduce aerodynamic drag by seeking the relatively optimal combination of two parameters above. The study reveals that when the combination of the inclination angle of rear window and bottom inclination angle of aft is 25^oand 0.067^o, the total pressure and streamline distribution in the flow fields of the MIRA model are improved greatly and the C_D is reduced compared with the worst combination. This conclusion will have profound guiding significance in the aerodynamic design of the rear styling and shape of a car.

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Periodical:

Advanced Materials Research (Volumes 774-776)

Pages:

428-432

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.774-776.428

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Online since:

September 2013

Authors:

Qian Qian Du, Xing Jun Hu, Qi Fei Li, Yu Kun Liu, Bo Yang

Keywords:

Aerodynamic, Computational Fluid Dynamics (CFD), MIRA Model, Numerical Optimization

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