摘要
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.
出处
《水力发电学报》
EI
CSCD
北大核心
2010年第2期239-243,共5页
Journal of Hydroelectric Engineering
基金
浙江省科技计划项目(2007C21064)
水沙科学与水利水电工程国家重点实验室开放基金(sklhse-2007-E-01)
山东省自主创新重大科技专项计划(2006GG1108022)
关键词
水力机械
潮流水轮机
对称翼型
流动分离
hydraulic machinery
tidal turbine
symmetrical vane section profile
flow separation
