Open Access
ARTICLE
On Aircraft Lift and Drag Reduction Using V Shaped Riblets
Zihai Geng1,2,*, Jinsheng Cai1, Yubiao Jiang1,2, Weiguo Zhang1,2
1 Aviation College of Northwestern Polytechnical University, Xi’an, 710072, China
2 China Aerodynamic Research and Development Center, Mianyang, 621000
* Corresponding Author: Zihai Geng. Email:
(This article belongs to this Special Issue: EFD and Heat Transfer II)
Fluid Dynamics & Materials Processing 2021, 17(5), 899-915. https://doi.org/10.32604/fdmp.2021.012108
Received 15 June 2020; Accepted 22 February 2021; Issue published 05 July 2021
Abstract
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.
Keywords
Cite This Article
Geng, Z., Cai, J., Jiang, Y., Zhang, W. (2021). On Aircraft Lift and Drag Reduction Using V Shaped Riblets.
FDMP-Fluid Dynamics & Materials Processing, 17(5), 899–915.