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为了研究流场的空间分布特点,建立了垂直轴潮流水轮机在水槽中的物理模型,采用Fluent软件中的滑移网格技术对模型的流场进行了三维数值模拟,分析了不同时刻不同截面上模型速度场的变化规律以及同一时刻不同直线上模型速度场和压力场的分布特点。结果表明,叶轮在水槽中旋转,所处位置不同,流场的分布有所差异,流动充分后,流场的变化具有周期性;叶轮内部速度场的变化最为紊乱,叶片周围的速度发生急剧变化;叶轮在旋转过程中产生漩涡,叶片迎流面的压力急剧上升,背流面的负压最为强烈。
In order to study the spatial distribution characteristics of the flow field, a physical model of a vertical axis tidal current turbine in a water tank is established. The flow field in the Fluent software is used to perform three-dimensional numerical simulation of the flow field, and different sections The variation rule of model velocity field and the distribution of velocity and pressure fields on different straight lines at the same time. The results show that the impeller rotates in the water tank with different positions and the distribution of the flow field is different. When the flow is full, the flow field has the periodicity. The variation of the velocity field inside the impeller is the most disordered and the velocity around the leaves changes drastically ; Impeller vortex in the rotation process, the pressure of the leaf Ying Ying surface sharp rise, the most negative negative pressure on the back surface.