Propulsive performance of a passively flapping plate in a uniform flow

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• 作者：Rui HAN ((闊╃憺))^aAuthor Vitae ; Jie ZHANG ((寮犳澃))^b ; Lei CAO ((鏇瑰瀿))^a ; ^{leicao@rcess.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Xi-yun LU ((闄嗗浜?)^b ; ^{xlu@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：propulsive performance ; passively flapping plate ; flapping-based locomotion ; flexibility effect ; propulsive efficiency
• 刊名：Journal of Hydrodynamics, Ser. B
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：27
• 期：4
• 页码：496-501
• 全文大小：1229 K

文摘

Propulsive performance of a passively flapping plate in a uniform viscous flow has been studied numerically by means of a multiblock lattice Boltzmann method. The passively flapping plate is modeled by a rigid plate with a torsion spring acting about the pivot at the leading-edge of the plate, which is called a lumped-torsional-flexibility model. When the leading-edge is forced to take a vertical oscillation, the plate pitches passively due to the fluid-plate interaction. Based on our numerical simulations, various fundamental mechanisms dictating the propulsive performance, including the forces on the plate, power consumption, propulsive efficiency and vortical structures, have been studied. It is found that the torsional flexibility of the passively pitching plate can improve the propulsive performance. The results obtained in this study provide some physical insights into the understanding of the propulsive behaviors of swimming and flying animals.