Numerical simulation of unsteady flows over a slow-flying bat

被引：102

作者：

Wang, Shizhao ^{[1
]}

Zhang, Xing ^{[1
]}

He, Guowei ^{[1
]}

Liu, Tianshu ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

[2] Western Michigan Univ, Dept Mech & Aerosp Engn, Kalamazoo, MI 49008 USA

来源：

THEORETICAL AND APPLIED MECHANICS LETTERS | 2015年 / 5卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Flapping flight; Bat; Lift; Leading-edge vortex; Vortex lift; Numerical simulation;

D O I：

10.1016/j.taml.2015.01.006

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This letter describes numerical simulation of the unsteady flow over a slow-flying bat by using the immersed boundary method based on the measured bat wing geometry and kinematics. The main vortical structures around the bat flapping wings are identified, illuminating the lift-generating role of the leading-edge vortices generated mainly in the downstroke. Furthermore, the lift decomposition indicates that the vortex lift has the dominant contribution to the time-averaged lift and the lift associated with the fluid acceleration has the relatively moderate effect. (C) 2015 The Authors. Published by Elsevier Ltd on behalf of The Chinese Society of Theoretical and Applied Mechanics.

引用

页码：5 / 8

页数：4

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