Airfoil profile surface drag reduction characteristics based on the structure of the mantis shrimp abdominal segment
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O R I G I NA L
Yunqing Gu · Ke Xia · Wenqi Zhang · Jiegang Mou Denghao Wu · Wei Liu · Maosen Xu · Peijian Zhou · Yun Ren
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Airfoil profile surface drag reduction characteristics based on the structure of the mantis shrimp abdominal segment
Received: 23 December 2019 / Accepted: 18 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract To reduce the drag of fluid on a surface, the parameterized structure of the mantis shrimp abdominal segment was analyzed to design the airfoil profile, and a calculation model was established based on the biological characteristics of the mantis shrimp. By using a numerical simulation method, the change in the viscous sublayer and drag reduction of the biological surface under different flow velocities and with different numbers of airfoil profiles was analyzed, and the mechanism of the drag reduction of the biological airfoil profile was revealed. The results show that the biological surface with airfoil profiles exhibited a better drag reduction effect. With an increase in airfoil profile numbers, the drag reduction rate first decreased and then increased. When the flow velocity was 10 m/s and the number of airfoil profiles was 5, the drag reduction rate exhibited the largest value of 15.33%. This result showed that the biological airfoil profile could affect the structure of the wall turbulent boundary layer and diminish the velocity gradient of the boundary layer, which finally changed the interaction pattern between the fluid and wall. In addition, the vortex cushioning effect was created to change the friction between the fluid and the wall into a rolling friction with a lower friction coefficient, thus reducing the shear stress on the wall, which achieved drag reduction. Keywords Mantis shrimp · Abdominal segment · Airfoil profile · Drag reduction · Drag reduction mechanism Y. Gu (B) · J. Mou · D. Wu · M. Xu · P. Zhou College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, People’s Republic of China E-mail: [email protected] K. Xia College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, People’s Republic of China K. Xia E-mail: [email protected] J. Mou E-mail: [email protected] W. Zhang College of Energy Engineering, Zhejiang University, Hangzhou 310027, People’s Republic of China W. Liu College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, People’s Republic of China Y. Ren Zhijiang College, Zhejiang University of Technology, Shaoxing 312030, People’s Republic of China
Y. Gu et al.
1 Introduction In the field of navigation, the surface friction drag of a ship accounts for approximately 50% of the total drag, while the surface friction drag of an underwater vehicle accounts for 70% of the total drag [1]. Surface drag reduction technology can efficiently reduce energy consumption in aviation, aerospace and marine industries, which are of great theoretical and practical value for mitigating the energy crisis [2,3]. At present, some reasonabl
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