The hybrid vertical axis wind turbines (VAWTs), which are constructed by a combination of the Savonius and Darrieus rotors, have recently been proposed to improve the wind energy extraction from the free-wind flow. This study focuses on the impact of internal rotor parameters on the aerodynamic performance of the resultant hybrid rotor. For this goal, a two-blade Savonius rotor constructed by conventional semicircle blades with a constant overlap ratio of 0.2 is attached to a two-blade Darrieus rotor constructed by straight NACA 0018 blades. The resultant hybrid rotor has a constant diameter ratio of 0.2. To assess the Savonius wind turbine parameters, three various attachment angles of 0°, 45°, and 90° are examined under various wind potentials having average wind speeds of 5 and 10 m/s. A set of computations is performed at different tip speed ratios (TSR) of 1.5, 2.5, and 3.5. The obtained results have been validated against the available data for both Savonius and Darrieus rotors and good agreements are obtained from these comparisons. It is revealed that selecting an appropriate attachment angle is strongly dependent on the free-wind speed and TSR. Additionally, regardless of the free-wind speed, the hybrid rotor with an attachment angle of 45° presents the maximum power coefficient among the hybrid and non-hybrid rotors for TSR = 1.5 and 2.5. However, at TSR = 3.5, the hybrid rotor with ϕ = 0° and Darrieus rotor exhibit optimal performances among the considered cases at U_∞ = 5 m/s and 10 m/s, respectively.

最近，提出了一种由萨沃纽斯（Savonius）和达里厄斯（Darrieus）转子组合构成的混合垂直轴风力涡轮机（VAWT），以改善自由风中的风能提取。这项研究的重点是内部转子参数对所得混合转子空气动力学性能的影响。为此，将由传统的半圆形叶片（重叠率恒定为0.2）构成的两叶片Savonius转子连接到由直NACA 0018叶片构成的两叶片Darrieus转子上。所得的混合转子具有0.2的恒定直径比。为了评估Savonius风力发电机的参数，在平均风速为5和10 m / s的各种风势下检查了0°，45°和90°的三个不同的附着角。在1.5、2.5和3.5的不同尖端速度比（TSR）下执行一组计算。相对于Savonius和Darrieus转子的可用数据，已经验证了所获得的结果，并且从这些比较中获得了良好的一致性。揭示了选择合适的附接角度强烈地取决于自由风速和TSR。此外，无论自由风速如何，对于TSR = 1.5和2.5，具有45°附着角的混合动力转子在混合动力和非混合动力转子中都表现出最大的功率系数。但是，在TSR = 3.5时，U = 0°的混合转子和Darrieus转子在考虑的U情况下表现出最佳性能。相对于Savonius和Darrieus转子的可用数据，已经验证了所获得的结果，并且从这些比较中获得了良好的一致性。揭示了选择合适的附接角度强烈地取决于自由风速和TSR。此外，无论自由风速如何，对于TSR = 1.5和2.5，具有45°附着角的混合动力转子在混合动力和非混合动力转子中都表现出最大的功率系数。但是，在TSR = 3.5时，U = 0°的混合转子和Darrieus转子在考虑的U情况下表现出最佳性能。相对于Savonius和Darrieus转子的可用数据，已经验证了所获得的结果，并且从这些比较中获得了良好的一致性。揭示了选择合适的附接角度强烈地取决于自由风速和TSR。此外，无论自由风速如何，对于TSR = 1.5和2.5，具有45°附着角的混合动力转子在混合动力和非混合动力转子中都表现出最大的功率系数。但是，在TSR = 3.5时，U = 0°的混合转子和Darrieus转子在考虑的U情况下表现出最佳性能。当TSR = 1.5和2.5时，具有45°附着角的混合动力转子呈现出混合动力和非混合动力转子中的最大功率系数。但是，在TSR = 3.5时，U = 0°的混合转子和Darrieus转子在考虑的U情况下表现出最佳性能。当TSR = 1.5和2.5时，具有45°附着角的混合动力转子呈现出混合动力和非混合动力转子中的最大功率系数。但是，在TSR = 3.5时，U = 0°的混合转子和Darrieus转子在考虑的U情况下表现出最佳性能。_∞分别 为5 m / s和10 m / s。