Effects of geometric shape on the hydrodynamics of a self-propelled flapping foil
Effects of geometric shape on the hydrodynamics of a self-propelled flapping foil
复制标题
几何形状对自航式扑翼水动力学的影响
DOI:
10.1063/1.3251045
复制
发表时间:
2009-10
影响因子:
4.6
通讯作者:
Wang, Shizhao
中科院分区:
文献类型:
--
作者:
He, Guowei;Zhang, Xing;Ni, Saizhen;Wang, Shizhao
The hydrodynamics of a free flapping foil is studied numerically. The foil undergoes a forced vertical oscillation and is free to move horizontally. The effect of chord-thickness ratio is investigated by varying this parameter while fixing other ones such as the Reynolds number, the density ratio, and the flapping amplitude. Three different flow regimes have been identified when we increase the chord-thickness ratio, i.e., left-right symmetry, back-and-forth chaotic motion, and unidirectional motion with staggered vortex street. It is observed that the chord-thickness ratio can affect the symmetry-breaking bifurcation, the arrangement of vortices in the wake, and the terminal velocity of the foil. The similarity in the symmetry-breaking bifurcation of the present problem to that of a flapping body under constraint is discussed. A comparison between the dynamic behaviors of an elliptic foil and a rectangular foil at various chord-thickness ratios is also presented.
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DOI:
10.1016/j.jcp.2008.01.021
发表时间:
2008-05
期刊:
J. Comput. Phys.
影响因子:
--
作者:
S. Alben
通讯作者:
S. Alben
DOI:
10.1080/10618560601140094
发表时间:
2006-10
影响因子:
1.3
作者:
Xing Zhang
通讯作者:
Xing Zhang
影响因子:
2.5
作者:
Jones, KD;Dohring, CM;Platzer, MF
通讯作者:
Platzer, MF
影响因子:
3.7
作者:
Dutsch, H;Durst, F;Lienhart, H
通讯作者:
Lienhart, H
影响因子:
2.5
作者:
M. Koochesfahani
通讯作者:
M. Koochesfahani