Iosilevskii G, Weihs D
Faculty of Aerospace Engineering, Technion, Haifa 32000, Israel.
J R Soc Interface. 2008 Mar 6;5(20):329-38. doi: 10.1098/rsif.2007.1073.
Physical limits on swimming speed of lunate tail propelled aquatic animals are proposed. A hydrodynamic analysis, applying experimental data wherever possible, is used to show that small swimmers (roughly less than a metre long) are limited by the available power, while larger swimmers at a few metres below the water surface are limited by cavitation. Depending on the caudal fin cross-section, 10-15 m s(-1) is shown to be the maximum cavitation-free velocity for all swimmers at a shallow depth.
本文提出了新月形尾鳍推进的水生动物游泳速度的物理限制。通过尽可能应用实验数据进行的流体动力学分析表明,小型游泳者(大致小于1米长)受可用功率限制,而在水面以下几米处的大型游泳者则受空化限制。根据尾鳍横截面,对于所有在浅深度的游泳者,10 - 15米/秒被证明是最大无空化速度。