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为了探究翼型对垂直轴水轮机水力效率的影响,基于叶素理论分析建立了垂直轴潮流水轮机在水槽中的物理模型,采用滑移网格技术在Fluent软件中对模型的流场进行了三维数值模拟。在保持转速一定、更改来流速度即改变叶尖速比的条件下,分析了两种不同NACA翼型直叶片的潮流水轮机内部流场以及水力性能。结果表明,翼型以及叶片安装角对垂直轴潮流水轮机的利用效率影响很大,其流动特性与来流速度、叶片布置形式有重要联系,为新型潮流水轮机的设计和翼型的选择应用提供了依据。
In order to explore the influence of airfoil on the hydraulic efficiency of vertical axis turbine, the physical model of vertical axis tidal current turbine in the water tank was established based on the analysis of the elemental theory. The flow field of the vertical axis turbocharger was simulated by Fluent software in three-dimensional simulation. The flow field and hydraulic performance of tidal current turbine with two different NACA airfoil straight blades were analyzed under the condition of changing the flow velocity and changing the tip speed ratio. The results show that the airfoil and the mounting angle of the blade greatly affect the utilization efficiency of the vertical axis tidal current turbine. The flow characteristics of the vertical axis tidal current turbine are closely related to the flow velocity and the arrangement of the blades. The results provide a good choice for the design of the new tidal current turbine and the selection and application of airfoils in accordance with.