Effects of mass and chordwise flexibility on 2D self-propelled flapping wings
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- 作者：Mathieu Olivier ; mathieu.olivier@gmc.ulaval.ca" class="auth_mail" title="E-mail the corresponding author ; Guy Dumas guy.dumas@gmc.ulaval.ca" class="auth_mail" title="E-mail the corresponding author
- 关键词：Flexible flapping wings ; Fluid&ndash ; structure interaction ; Self-propulsion ; Deviation motion
- 刊名：Journal of Fluids and Structures
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：64
- 期：Complete
- 页码：46-66
- 全文大小：2830 K
文摘
A self-propelled flexible flapping wing 2D numerical model undergoing a combined pitching and heaving motion is presented. Since such freely moving foil experiences zero net thrust, a definition of efficiency for this kind of problem is proposed and discussed against other formulations found in the literature. It is also shown that the deviation motion of wings such as that found in natural flyers is likely a consequence of the fluid–structure dynamics of the wings. The passive deviation motion observed in numerical simulations is either a consequence of a feathering mechanism referred to as rigid feathering or of the inertial displacement caused by the wing deformation. The effects of flexibility on the performance of the wing are also presented. It is found that flexibility may significantly enhance the efficiency in pressure-driven deformation cases. The rigid feathering mechanism is found to have an effect similar to that of the feathering caused by wing flexibility on the performances of pressure-driven deformation cases.