On Aircraft Lift and Drag Reduction Using V Shaped Riblets  

作　　者：Zihai Geng Jinsheng Cai Yubiao Jiang Weiguo Zhang 

机构地区：[1]Aviation College of Northwestern Polytechnical University,Xi’an,710072,China [2]China Aerodynamic Research and Development Center,Mianyang,621000

出　　处：《Fluid Dynamics & Materials Processing》2021年第5期899-915,共17页流体力学与材料加工（英文）

摘　　要：Reducing drag during take-off and nominal(cruise)conditions is a problem of fundamental importance in aeronautical engineering.Existing studies have demonstrated that v-shaped symmetrical riblets can effectively be used for turbulence control,with those with dimensionless depth h+=15 and dimensionless width s+=15 having the best drag reduction effect.In the present study,experimental tests have been conducted considering two models of the same size,one with smooth surface,the other with v-shaped riblets of the h+=15 and s+=15 type.The results show that for an angle of attack in the 8°~20°range(take-off stage),the maximum lift coefficient can be increased by 22%.For angle of attack between 8°and 14°,a drag reduction effect can be produced using riblets,which increases with the Reynolds number,leading to a decrease in the drag coefficient maximum of 36%.Flow visualization experiments have been carried out by means of Laser Induced fluorescence.

关 键 词：Transport model V-shaped riblet lifting drag reduction flow visualization 

分 类 号：O35[理学—流体力学]