某SUV后盖处缝道对整车空气动力学影响

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中图分类号：U463.832；TP391.99 文献标志码：1

Influence of SUV rear hatch panel gaps on aerodynamic performance

YANG Fan，JIANG Zuxiao，SHEN Zhe(SAICVolkswagenAutomotiveCo.，Ltd.，Shanghai2O18O5，China）

Abstract: In order to study the influence of rear hatch gaps and cavities on the flow field structure and overall aerodynamic drag of an SUV，a combined approach of numerical simulation and clay model wind tunnel esting is employed，the aerodynamic performance variations caused by sealing gaps at different locations are analyzed,and their underlying mechanisms are examined.The results show thatthe internal drag contribution of the rear hatch cavity to the overall aerodynamic drag is minimal，approximately 0.3% . When the gaps near the side spoiler are sealed,the airflow separation induced by cavity jet flow is mitigates，and the vehicle’s drag coefficient is reduced by O.OO2. The research results can provide ideas for the refined development of vehicle aerodynamic performance.

Key words: SUV;aerodynamic optimization; rear hatch panel gaps; cavity； pressure drag

0 引言

空气阻力是汽车行驶阻力中的重要组成部分，其随着汽车行驶速度的增加而快速增长[1]，随着新能源汽车产业的蓬勃发展，优化风阻成为汽车行业关注的重点。（剩余8451字）