井字形格栅对厢式货车减小气动阻力的实验研究

AN EXPERIMENTAL STUDY OF SQUARE-FORMED FENCES FOR REDUCING THE AERODYNAMIC DRAG OF A VAN TRUCK

本文介绍了用被动控制边界层的方法 ,即在厢式货车厢体的迎风面上安装井字形格栅 ,其导流作用减小了厢体迎风面的压力 ,推迟厢体上表面前部边界层的分离 ,改善了汽车绕流的状况 ,从而减小了厢式货车的压差阻力。由于井字形格栅制作简单 ,造价低廉 ,安装方便 。

A method of passively controlled boundary layer is introduced. Square formed fences mounted on the front face of the bluff body of the truck are used to reduce the pressure on the face against the wind, delay the separation of the boundary layer on the front section of the top face, and improve the state of air flowing around the body and decrease the drag resulting from pressure difference. The proposal broadens the way of reducing drag and saving energy.