水动力学研究与进展B辑
水動力學研究與進展B輯
수동역학연구여진전B집
Journal of Hydrodynamics
2015年
4期
496-501
,共6页
韩瑞%张杰%曹垒%陆夕云
韓瑞%張傑%曹壘%陸夕雲
한서%장걸%조루%륙석운
propulsive performance%passively flapping plate%flapping-based locomotion%flexibility effect%propulsive efficiency
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.
