Three-dimensional CFD simulations are carried out to study the increase of power generated from Savonius vertical axis wind turbines by modifying the blade shape and blade angel of twist. Twisting angle of the classical blade are varied and several proposed novel blade shapes are introduced to enhance the performance of the wind turbine. CFD simulations have been performed using sliding mesh technique of ANSYS software. Four turbulence models; realizable k -$\mathrm{ }\epsilon$, standard k - $\epsilon$, SST transition and SST k -$\mathrm{ }\omega$ are utilized in the simulations. The blade twisting angle has been modified for the proposed dimensions and wind speed. The introduced novel blade increased the power generated compared to the classical shapes. The two proposed novel blades achieved better power coefficients. One of the proposed models achieved an increase of 31% and the other one achieved 32.2% when compared to the classical rotor shape. The optimum twist angel for the two proposed models achieved 5.66% and 5.69% when compared with zero angle of twist.

进行了三维CFD仿真，以通过修改叶片形状和叶片扭转角来研究Savonius垂直轴风力涡轮机发电量的增加。经典叶片的扭转角是变化的，并且引入了几种建议的新颖叶片形状以增强风力涡轮机的性能。已经使用ANSYS软件的滑动网格技术进行了CFD仿真。四种湍流模型；可实现的k-$\mathrm{ }\epsilon$，标准k- $\epsilon$，SST转换和SST k-$\mathrm{ }\omega$用于模拟。叶片扭转角已针对建议的尺寸和风速进行了修改。与经典形状相比，引入的新型刀片增加了发电量。提出的两个新型叶片获得了更好的功率系数。与经典转子形状相比，其中一种提出的模型增加了31％，另一种提出了32.2％。与零扭转角相比，两个建议模型的最佳扭转角度分别达到5.66％和5.69％。