主动进气格栅角度对整车前舱进气性能影响的数值分析研究

基于计算流体动力学（Computational Fluid Dynamics，CFD）研究了前端主动进气格栅的叶片角度对于前舱冷却气流进气量的影响。主动进气格栅可以有效地降低整车风阻，但其对于前端开口面积的阻挡，会使前舱冷却气流有一定程度的下降。通过数值仿真法在造型固定的情况下，改变主动进气格栅叶片的角度，研究冷却气流进风量的变化和叶片角度的关系。研究发现，通过调整叶片角度，可以在相同的格栅开口下，获得更多的进气量。对比了不同角度下前舱流场的不同，分析了前舱进气流量增加的原因，为主动进气格栅的设计提供了方向。

Numerical Study on Influence of Active Shutter Vane Angle on Vehicle Front-End Airflow

Active grille shutter (AGS) is an effective part to reduce C D ; however, it blocks the effective grille opening area leading to the reduction of front-end airflow. In this paper, the influence of active shutter vane angle on front-end airflow had been studied and based on the CFD method, the vane angle optimization was conducted to improve the front-end airflow volume. The results show that with the same grille opening,the volume of front-end airflow can be increased by changing the vane angle. In addition, the airflow for different vane angles were compared and the reason for the change in airflow was analyzed.