Experimental study of hydrodynamic forces acting on artificial fish in a von Kármán vortex street
Experimental study of hydrodynamic forces acting on artificial fish in a von Kármán vortex street
复制标题
冯卡门涡街人工鱼水动力实验研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Kruusmaa
中科院分区：
文献类型：
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作者：
G. Toming;Lily D. Chambers;M. Kruusmaa
本文描述了作用在不同大小的鱼形物体上的水动力在冯卡门涡街中，在物体的尾流中观察到特定的运动模式，卡门gaiting。本文研究了在这些水动力条件下被动鱼形体所受的水动力，包括侧向力和力矩。通过使用一系列的鱼的长度，唤醒波长，大小事项进行了实验测试，用于平衡的力量，拦截迎面而来的涡流的人工鱼，潜在地利用流动中的横向和旋转元素，可以促进卡门gaiting在生物鱼。要做到这一点，五个人工鱼制造模仿虹鳟鱼（虹鳟鱼），插入到流动隧道，同时记录的水动力和DPIV图像。实验结果表明，即使鱼形物体的体长超过尾波波长，支撑卡门步态的水动力也不会停止。总体而言，所获得的结果有助于了解鱼和流体的相互作用时，游泳在卡门涡街。
The present paper describes the hydrodynamic forces acting on different sized fish-shaped objects in a von Karman vortex street, where in a wake of an object a specific locomotion pattern, Karman gaiting, is observed. The present paper investigates the hydrodynamic forces, both lateral force and torque on a passive fish-shaped body in those hydrodynamic conditions. By using a range of fish length to wake wavelengths, size matters were experimentally tested for balancing the forces on an artificial fish intercepting oncoming vortices, potentially to exploit the lateral and rotational elements in the flow that may facilitate Karman gaiting in a biological fish. To do this, five artificial fish were manufactured to mimic a rainbow trout (Oncorhynchus mykiss), were inserted into the flow tunnel and recorded simultaneously the hydrodynamic forces and DPIV images. The experimental results found that the hydrodynamic forces supporting Karman gaiting did not stop even if the body length of the fish-like object exceeded the wake wavelength. Overall, the obtained results help to understand fish and fluid interactions when swimming in the Karman vortex street.