本文对一种适合于小型立轴潮流水轮机的THI翼型进行了流体动力特性和翼型外围的流动分析。经计算可知,该翼型在保持与机翼NACA633-0018相近的升力特性的同时,阻力系数稍微增大;从THI翼型全流体动力特性可知随攻角变化,流体力的变化异常剧烈,翼型的最大升力系数达到1.5、最大阻力系数1.1、最大升阻比28;除攻角0°附近之外的大部分攻角范围内,翼型外围的流动结构复杂,不仅出现回流,而且存在强烈的流动分离。这样的分离流动既影响翼型的升阻力特性,也可能引发流体振动。研究结果可为小型立轴潮流水轮机转轮的水力设计提供重要的参考。
The flow force and flow field around a THI vane section suitable for small vertical axis tidal turbines are analyzed. The calculation indicates that the equivalent lift of this vane is close to that of air foil NACA633- 0018 and the drag coefficient is greater. With the increase in attack angle,the fluid force varies greatly,with a max lift 1. 5,max drag 1. 1 and max lift-drag ratio 28. Except for a small range of attack angle near 0 degree, flow around the vane is very complicated including back flow and flow separation. These results would provide important references to hydraulic design of similar runners.