Locomotion of a passively flapping flat plate
Locomotion of a passively flapping flat plate
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被动扑动平板的运动
DOI：
10.1017/s0022112010002387
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发表时间：
2010-06
影响因子：
3.7
通讯作者：
Lu, Xi-Yun
中科院分区：
文献类型：
--
作者：
Zhang, Jie;Liu, Nan-Sheng;Lu, Xi-Yun
采用多块格子玻尔兹曼方法对被动拍动平板的运动进行了数值研究。一个柔性板由一个刚性板建模，在板的前缘绕枢轴有一个扭转弹簧作用。一个……（“dy”这里似乎不完整）
Locomotion of a passively flapping flat plate has been studied numerically by means of a multiblock lattice Boltzmann method. A flexible plate is modelled by a rigid plate with a torsion spring acting about the pivot at the leading edge of the plate. A dynamic model of this kind is called a lumped-torsional-flexibility model. When the leading edge is forced to heave sinusoidally, the plate pitches passively and propels itself in the horizontal direction as a result of the fluid–plate interaction. We have investigated various aspects of the mechanics behind the behaviour of the flapping plate, including the periodic- and non-periodic-flow states, the spontaneous motion of the plate, vortical structure and how they compare to similar propulsion systems in animals. In the periodic-flow regime, two dynamical responses of the passively pitching plate (forward and backward movements) are observed. Which movement will occur depends only on the frequency ratio F of the natural frequency of the system and the heaving frequency associated with the lumped torsional flexibility. It is found that the plate will select the forward movement when F > 1 and the backward movement when F ≤ 1. In the forward-movement regime, analysis of the dynamical behaviours and propulsive properties of the passively pitching plate indicates that the torsional flexibility can remarkably improve the propulsive performance. In addition, four kinds of vortex structures in the near wake are identified, which mainly depend on the forward speed of the plate. Finally the forward movement is compared to the flapping-based locomotion of swimming and flying animals. The results obtained in this study are consistent with the observations and measurements of swimming and flying animals; thus, they may provide physical insights into understanding of the propulsive mechanisms of the flapping wings and fins of animals.
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DOI：
10.1007/978-94-011-1580-3
发表时间：
1993
期刊：
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影响因子：
--
作者：
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通讯作者：
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DOI：
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发表时间：
1993-12
期刊：
The Journal of Experimental Biology
影响因子：
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作者：
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通讯作者：
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1975
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影响因子：
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作者：
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通讯作者：
Flying in Nature;T. Y. Wu;C. Brokaw;C. Brennen
影响因子：
3.7
作者：
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通讯作者：
Bohr, Tomas
DOI：
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发表时间：
2002-05
期刊：
The Journal of experimental biology
影响因子：
--
作者：
R. Ramamurti;W. Sandberg
通讯作者：
R. Ramamurti;W. Sandberg