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Journal of Applied Fluid Mechanics، جلد ۷، شماره ۴، صفحات ۶۵۹-۶۷۱
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عنوان انگلیسی Numerical and Experimental Investigations on the Aerodynamic Characteristic of Three Typical Passenger Vehicles
چکیده انگلیسی مقاله The numerical simulation and wind tunnel experiment were employed to investigate the aerodynamic characteristics of three typical rear shapes: fastback, notchback and squareback. The object was to investigate the sensibility of aerodynamic characteristic to the rear shape, and provide more comprehensive experimental data as a reference to validate the numerical simulation. In the wind tunnel experiments, the aerodynamic six components of the three models with the yaw angles range from -15 and 15 were measured. The realizable k-ε model was employed to compute the aerodynamic drag, lift and surface pressure distribution at a zero yaw angle. In order to improve the calculation efficiency and accuracy, a hybrid Tetrahedron-Hexahedron-Pentahedral-Prism mesh strategy was used to discretize the computational domain. The computational results showed a good agreement with the experimental data and the results revealed that different rear shapes would induce very different aerodynamic characteristic, and it was difficult to determine the best shape. For example, the fastback would obtain very low aerodynamic drag, but it would induce positive lift which was not conducive to stability at high speed, and it also would induce bad crosswind stability. In order to reveal the internal connection between the aerodynamic drag and wake vortices, the turbulent kinetic, recirculation length, position of vortex core and velocity profile in the wake were investigated by numerical simulation and PIV experiment.
کلیدواژه‌های انگلیسی مقاله Vehicle aerodynamic, Wind tunnel experiment, Numerical simulation, PIV
نویسندگان مقاله Y. Wang |
Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan University of Technology, Wuhan 430070, China

Y. Xin |
Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan University of Technology, Wuhan 430070, China

Zh. Gu |
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha 430082, China

Sh. Wang |
State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Changsha 430082, China

Y. Deng |
Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan University of Technology, Wuhan 430070, China

X. Yang |
Wuhan Ordnance Noncommissioned officers School, Wuhan 430075, China

نشانی اینترنتی https://www.jafmonline.net/article_1479_d499397b28eaa97805d9d5fa85bddc38.pdf
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