Caplan Nicholas, Gardner Trevor N
School of Psychology and Sport Sciences, Northumbria University, Newcastle upon Tyne, UK.
J Sports Sci. 2007 Nov;25(13):1471-8. doi: 10.1080/02640410701203468.
The aim of the present study was to find a more optimal blade design for rowing performance than the Big Blade, which has been shown to be less than optimal for propulsion. As well as the Big Blade, a flat Big Blade, a flat rectangular blade, and a rectangular blade with the same curvature and projected area as the Big Blade were tested in a water flume to determine their fluid dynamic characteristics at the full range of angles at which the oar blade might present itself to the water. Similarities were observed between the flat Big Blade and rectangular blades. However, the curved rectangular blade generated significantly more lift in the angle range 0-90 degrees than the curved Big Blade, although it was similar between 90 and 180 degrees. This difference was attributed to the shape of the upper and lower edges of the blade and their influence on the fluid flow around the blade. Although the influence of oar blade design on boat speed was not investigated here, the significant increases in fluid force coefficients for the curved rectangular blade suggest that this new oar blade design could elicit a practically significant improvement in rowing performance.
本研究的目的是找到一种比大桨叶更优化的桨叶设计，用于划船性能，大桨叶已被证明在推进方面并非最优。除了大桨叶，还在水槽中测试了平的大桨叶、平的矩形桨叶以及与大桨叶具有相同曲率和投影面积的矩形桨叶，以确定它们在桨叶可能与水接触的全角度范围内的流体动力学特性。在平的大桨叶和矩形桨叶之间观察到了相似之处。然而，弯曲的矩形桨叶在0 - 90度角范围内产生的升力明显大于弯曲的大桨叶，尽管在90度至180度之间两者相似。这种差异归因于桨叶上下边缘的形状及其对桨叶周围流体流动的影响。尽管此处未研究桨叶设计对船速的影响，但弯曲矩形桨叶流体力系数的显著增加表明，这种新的桨叶设计可能会在划船性能方面带来实际显著的改善。
