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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v14.i2.30
pages 171-182

THE TRANSIENT FLOW FIELD NUMERICAL ANALYSIS OF VEHICLES INTERSECTION FOR A VARIETY OF TRAVEL SPACING

Yu-Ren Wang
Department of Vehicle Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan, 912
Yu-Chang Cheng
Department of Vehicle Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan, 912

RESUMO

Driving safety and comfort have enormous relationship with the flow field surrounding vehicles. Especially, when two cars mutually overtake each other, flow field becomes complicated because the high-speed wind impinging on vehicles will cause disturbance phenomenon. This paper analyzes the flow field of two vehicles overtaking using the Computation Fluid Dynamics (CFD) method and applies dynamic grid technique to solve the unsteady 3D Navier−Stokes equation. This study used three test models for different vehicles spaces to monitor the change in flow field and to analyze related aerodynamic coefficients. The results showed that, when two vehicles spacing is very small, aerodynamic characteristic caused by the large vehicle has a very tremendous influence on the small car. This affects the drivability and control ability of the driver in the small car.


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