摘要
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 of the flow field,a physical model of the vertical axis tidal current turbine inside the sink is established.Based on the physical model and sliding grid technology,the three dimensional numerical simulation of the flow field is given by using the software Fluent.Both the velocity field on different sections at different moments and the distribution of the velocity and pressure field on different lines at the same moment are analyzed.The result shows that the distribution of the flow field varies at different positions with the impeller rotating in the sink and the change of the flow field will be cyclical under fully developed flow areas.The velocity field is very disordered inside the impellers and the speed changes rapidly around the blades.Under the impeller rotating,vortexes appear.The pressure increases rapidly in the front of the blades facing the flow and decreases to negative pressure rapidly in the back of the blades.
出处
《现代电力》
北大核心
2012年第2期68-71,共4页
Modern Electric Power
关键词
水槽
潮流水轮机
数值模拟
流场
静压
sink
tidal current turbine
numerical simulation
flow field
static pressure
