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中文摘要：
建立2D小型垂直轴风机模型，采用滑移网格技术，选用k-ε RNG湍流模型、SIMPLE算法，对模型的气动性能进行了非定常数值模拟研究。分析了垂直轴风机在不同工作时刻的流场情况，研究了速度场、涡量的分布以及风力机总转矩的变化规律。研究结果表明，风力机叶片周围速度存在明显梯度，计算区域在不同时刻的速度分布呈现较大差异。在旋转区域涡量较大，随着远离旋转区域，涡量值迅速减少。垂直轴风力机旋转过程中，风力机的总转矩呈现正负交替变化。
英文摘要：
In this paper,a 2D compact model of vertical axis wind turbine was established. And the sliding grid technology,the k-ε RNG turbulence model and the SIMPLE algorithm was applied to simulate the unsteady value of the model＇s aerodynamic performance. Through the analysis on the flow field at different moments, the rules about velocity fields,vortices distribution and the wind turbine＇ s total torque were obtained. The results show that. the speed around wind turbine blades have obvious gradient, the velocity distribution at different times show large differences in the cornputational domain. In the rotating domain vorticity is large. With away from the rotation domain,vor- ticity reduced quickly. In the process of rotating for vertical axis wind turbine,the wind turbine＇s total torque showed alternating positive and negative changes.
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