Research on Automobile Aerodynamic Drag Reduction Based on Isobaric Surface of a Blunt Body

Abstract:

This paper focuses on a new method of aerodynamic drag reduction. In this paper numerical simulation method is adopted to investigate the relationship between the aerodynamic drag characteristics of a blunt body and the distribution of total pressure around the body. The study shows that when the shape of a blunt body is modified to be close to its isobaric surface, the pressure drag of the body can be reduced largely while the viscous drag increases slightly, and the summary of the drag gets lower as a result. This conclusion will have profound guiding significance in the aerodynamic shape designing and the aerodynamic drag reduction of an automobile.

• Periodical: Applied Mechanics and Materials (Volume 328)
• Pages: 634-638
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.328.634
• Online since: June 2013
• Authors: Xing Jun Hu, Lei Liao, Xiu Cheng Li, Chang Hai Yang, Peng Guo, Bo Yang, Jing Yu Wang, Dong Liang
• Keywords: Aerodynamic, Aerodynamic Drag, Blunt Body, Isobaric Surface, Numerical Simulation

References

[1] FU Limin: Automotive aerodynamics. Beijing: China Machine Press (2006)

[2] Hu Xingjun, Zhang Rui, Ye Jian, Yan Xu, Zhao Zhiming: Influence of different diffuser angle on Sedan's aerodynamic characteristics.Physics Procedia. Vols.22 (2011), pp.239-245

DOI: 10.1016/j.phpro.2011.11.038

[3] Hu Xingjun, Zhang Rui, Ye Jian, Yan Xu, Zhao Zhiming: Design and aerodynamic assessment of diffuser with longitudinal separators for underbody of sedan. Mechanics and Materials. Vols. 215-216 (2012), pp.1033-1037

DOI: 10.4028/www.scientific.net/amm.215-216.1033

[4] Wang Xinyu, Hu Xingjun, Liao Lei, Li Tengfei: Numerical Simulation to investigate Influence of Additional Devices on Aerodynamic Drag for Heavy-duty Commercial Truck. Applied Mechanics and Materials. Vols. 209-211 (2012), pp.2089-2093

DOI: 10.4028/www.scientific.net/amm.209-211.2089

[5] Hu Xingjun, Liao Lei, Wang Jingyu, Fu Limin: Research on aerodynamic characteristics of a simplified SUV model. Applied Mechanics and Materials. Vols. 275-277 (2013), pp.603-606

DOI: 10.4028/www.scientific.net/amm.275-277.603

[6] Wang Fujun: Computational fluid dynamics analysis: CFD software principle and application. Beijing: Tsinghua University Press (2004)

[7] Yu Ping: Engineering Fluid Mechanics. Beijing: Science Press (2008)

[8] Hu Xingjun, Qin Peng, Guo Peng, An Yang: Effect of Turbulence Parameters on Numerical Simulation of Complex Automotive External Flow Field. Applied Mechanics and Materials. Vols. 52-54 (2011), pp.1062-1067

DOI: 10.4028/www.scientific.net/amm.52-54.1062

[9] Xiong Chaoqiang, Zang Mengyan, Fan Qinyin: Numerical Simulation of External Flow Field Around Low Drag Car and Its Error Analysis. Automotive Engineering. Vol. 34 (2012)

[10] Hu Xingjun, Li Tengfei, Wang Jingyu, Yang Bo, Guo Peng, Liao Lei: Numerical simulation of influence of rear-end panels on flow field in wake of a heavy-duty truck. Journal of Jilin University (Engineering and Technology Edition). Vol.42 (2012)