Blade number effect for a ducted wind turbine

被引:39
作者
Wang, Sheng-Huan [1 ]
Chen, Shih-Hsiung [1 ]
机构
[1] Natl Cheng Kung Univ, Dept Aeronaut & Astronaut, Tainan 70101, Taiwan
关键词
Wind turbine; Duct; CFD; Aerodynamics; Blockage effect; Number of blades;
D O I
10.1007/s12206-008-0743-8
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Ducted wind turbine with multiple blades installed was believed to have a good wind power energy conversion effect. However. little information was available On how to design a good ducted wind turbine Ill this paper the effects of blade number on a ducted wind turbine performance is studied. Numerical studies using, CFD method 10 simulate the wind turbine performance were adopted. The duct is a convering-diverging nozzle With thee turbine blades located at the throat. A rated output of a 1-kW turbine is adopted as the baseline design. It was found that the blade geometry, stagger angle, and number of blades have different duct blockage effects, and do affect the turbine performance (specifically the power coefficient and torque coefficient, etc.). The fewer number of blades has higher through flow speed, While the larger number of blades provides larger torque. The best power coefficient lies in between the two extremes. The appropriate number of blades is important to match the generator performance curve for Optimal Overall performance and efficiency.
引用
收藏
页码:1984 / 1992
页数:9
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