A Hydrodynamic Study of Active Drag in Swimming
A Hydrodynamic Study of Active Drag in Swimming
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游泳主动阻力的水动力研究
DOI：
10.1299/jsmeb.42.171
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
N. Kodan
中科院分区：
文献类型：
--
作者：
H. Takagi;Y. Shimizu;N. Kodan
本研究的目的是测量主动阻力，这是动态阻力作用于一个自我推进的游泳者在水中。我们开发了一种新的测量装置，它能够测量主动阻力，而不干扰自然游泳的循环水通道。四名大学熟练游泳运动员自愿参加这项研究。受试者被要求游泳前爬泳，并保持预定的中风频率范围内的0米/秒至1.8米/秒的流速。主动阻力是通过剩余推力（推力减去阻力）和被动阻力（作用于俯卧位游泳者的静态阻力）之间的关系来估计的。由于这些发展，有可能比以前更精确地测量主动阻力，并获得在雷诺数范围内预测主动阻力等于实际游泳速度的实验方程。
The purpose of this study is to measure active drag, which is dynamic drag acting on a self-propelling swimmer in water. We developed a new measurement device, which was capable of measuring active drag without disturbing natural swimming in a circulating water channel. Four collegiate skilled swimmers volunteered to participate in this study. The subjects were asked to swim front crawl and to keep the pre-determined stroke frequency within a range of 0 m/s to 1.8 m/s flow velocity. The active drag was estimated by means of the relationship between residual thrust (thrust minus the resistance) and passive drag (static drag acting on a prone position swimmer). As a result of these development, it was possible to measure active drag more precisely than before, and to obtain the experimental equation that predicted the active drag within a range of Reynolds number equaled the actual swimming velocity.