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提出了扭角180°的两叶片螺旋形S型风轮,采用k-ε数学模型从偏心系数G、封盖直径D0、内隔板数N、螺距P4个关键结构参数,对其结构进行优化设计。结果显示:当G=0.19或封盖直径与风轮直径比(D0/D=1.1)或N=6或P=6.0时,风轮性能分别达最佳;当G=0.19、D0/D=1.1、N=6和P=6.0时,螺旋形S风轮的风能利用率,在叶尖速比0.75时达0.21。对试验工况进行模拟,试验值与计算值吻合良好,说明计算值可信。
A two-blade helical S-shaped rotor with a twist angle of 180 ° is proposed. The k-ε mathematical model is used to optimize the structure of the rotor from the key parameters of eccentricity G, diameter D0 of the cover, number of internal partitions N and pitch P4 design. The results show that when G = 0.19 or the ratio of the diameter of the cover to the diameter of the rotor (D0 / D = 1.1) or N = 6 or P = 6.0, the performance of the rotor is the best when G = 0.19 and D0 / D = 1.1, N = 6 and P = 6.0, the wind energy utilization of the helical S wind wheel reaches 0.21 at a tip speed ratio of 0.75. The test conditions were simulated, the experimental values and calculated values agree well, indicating that the calculated value is credible.