HYDRODYNAMIC STUDY ON A PECTORAL FIN ROWING MODEL OF A FISH
HYDRODYNAMIC STUDY ON A PECTORAL FIN ROWING MODEL OF A FISH
复制标题
DOI：
10.1016/s1001-6058(08)60172-9
复制
发表时间：
2009-08-01
影响因子：
2.5
通讯作者：
Hu Wen-rong
中科院分区：
文献类型：
--
作者：
Hu Wen-rong
鱼类胸鳍的运动主要涉及一种基于阻力和一种基于升力的产生推力的机制。本文对基于阻力机理的胸鳍划船推进模型进行了数值研究。胸鳍划水模型的推进机理与流场中的涡度和压力有关。分析了推力与运动学参数之间的关系以及尾流捕获问题。结果表明，在作功冲程中产生较大的推力，主要是由于后向平移加速度、反摆角加速度和匀速平移时无失速。进一步分析了动态柔性变形的控流机理和效果。合理选择可控因素，采用适当的动态变形，可以提高推进性能。
Fish pectoral fin movement involves primarily a drag-based and a lift-based mechanisms to produce thrust. A numerical study on a pectoral fin rowing propulsion model based on the drag-based mechanism is presented in this article. The propulsive mechanism of the pectoral fin rowing model is related with the voriticity and pressure in the flow field. The relationship between the thrust and kinematic parameters and the wake-captured problem are analyzed. It is shown that a high thrust is produced in the power stroke, mainly due to the backward translation acceleration, the anticlockwise angular acceleration and the absence of stall in the uniform translation. Moreover, the flow control mechanism and the effect of dynamic flexible deformation are further analyzed. To properly choose controllable factors and adopt an appropriate dynamic deformation can improve the propulsive performance.