Experimental studies on a preferable blade profile for high efficiency and the blade characteristics of Darrieus-type cross-flow water turbines
Experimental studies on a preferable blade profile for high efficiency and the blade characteristics of Darrieus-type cross-flow water turbines
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大流式横流式水轮机高效优选叶片型线及叶片特性试验研究
DOI：
10.1299/jsmeb1988.34.2_149
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
K. Takenouchi
中科院分区：
文献类型：
--
作者：
Y. Takamatsu;A. Furukawa;K. Okuma;K. Takenouchi
除了叶片性能外，还测量了作用在Darrieus型转轮叶片上的流体力和力矩。在无粘流中，根据测量数据和理论考虑，对各种类型叶片的特性进行了评估。这些特性的一些功能，包括动态影响所造成的非定常相对流动的Darrieus叶片，在本文件中显示。为了获得高效率，建议采用弦长相对较长的非弧薄叶片。它的特点是升力斜率大，零攻角时升力高，在很宽的非失速迎角区阻力相对较低。还应在叶片50%弦点处将其设置为与转轮节圆相切。
Fluid forces and moment acting on a blade of the Darrieus-type runner were measured in addition to the blade performance. The characteristics for various type of blades were evaluated from the measured data with theoretical considerations in an inviscid flow. Some features of those characteristics, including the dynamic effects caused by an unsteady relative flow around the Darrieus-blade, are shown in the present paper. For high efficiency, a noncambered thin blade with relatively long chord length is recommended. Its characteristics are high lift slope, high lift at zero angle of attack and relatively low drag in a wide no-stall region of attack angles. It should also be set tangent to the runner pitch-circle at the 50% chord point of the blade.