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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: email

(This article belongs to the Special Issue: EFD and Heat Transfer II)

Fluid Dynamics & Materials Processing 2021, 17(5), 899-915.


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.


Cite This Article

APA Style
Geng, Z., Cai, J., Jiang, Y., Zhang, W. (2021). On aircraft lift and drag reduction using V shaped riblets. Fluid Dynamics & Materials Processing, 17(5), 899-915.
Vancouver Style
Geng Z, Cai J, Jiang Y, Zhang W. On aircraft lift and drag reduction using V shaped riblets. Fluid Dyn Mater Proc. 2021;17(5):899-915
IEEE Style
Z. Geng, J. Cai, Y. Jiang, and W. Zhang "On Aircraft Lift and Drag Reduction Using V Shaped Riblets," Fluid Dyn. Mater. Proc., vol. 17, no. 5, pp. 899-915. 2021.

cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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