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In the present paper, CFD simulation is used to perform the numerical calculation of behaviours of multi-blade drag typed VAWT. The sliding grid technology, FLUENT software and PISO algorithm are involved. By taking wind power efficiency C p as the goal function, the optimal situations of multi-blade drag typed VAWT with 4 and 6 blades are conducted by CFD simulation. In this investigation, the variable parameters include the rotation rate of wind-mill ω, the blade installation angle θ and the blade width d. The results show that: the optimal working conditions for the 4-blade wind mill at the inlet wind speed 8 m/s are ω = 18 r/ min, θ = 28°, and d = 0.83 m, which induces an optimal wind power efficiency rate C p = 27.127%; the optimal working conditions for the 6-blade wind mill at the inlet wind speed 8 m/s are ω = 18 r/min, θ = 27°, and d = 0.67 m, which leads to an optimal wind power efficiency rate C p = 30.404%.

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. 10.1016/j.energy.2017.07.028 [22] M. Zheng , L. Zhang , H. P. Teng , J. Hu , and M. L. Hu , “ Power efficiency of multi-blade drag typed VAWT by CFD simulation ,” Int. Rev. Appl. Sci. Eng. , vol. 9 , no. 1 , pp. 25 – 29 , 2018 . [23

Open access