应用激面模型潮流能水轮机的数值模拟  

NUMERICAL SIMULATION ON TIDAL CURRENT TURBINES WITH ACTUATOR SURFACE MODEL

作　　者：白光辉[1] 李国君[1] 龚建英[1] 

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,西安710049

出　　处：《太阳能学报》2015年第4期900-906,共7页Acta Energiae Solaris Sinica

摘　　要：为了减少潮流能水轮机模型流场计算所需的网格数并提高透平近尾流区流场的精度,在潮流能水轮机流场数值计算中引入激面模型。通过数值计算获得与实验一致的潮流能水轮机用水翼不同攻角下沿弦长的压力分布,应用二维激面模型模拟攻角为10.8°时水翼周围流场的压力分布与翼型结构模型数值计算结果相吻合。在此基础上将二维激面模型扩展成三维激面模型,分析三叶片潮流能水轮机的水动力性能与近尾流场结构,结果显示:应用三维激面模型计算获得的透平水动力性能与实验结果和激盘模型结果基本一致;在计算域网格数相近的情况下,激面模型获得较激盘模型更详细的潮流能水轮机近尾流场。结果证明了激面模型的优越性,并可应用于潮流能水轮机水动力性能及流场计算。An actuator surface model was introduced to the numerical simulation of tidal turbine flow field for reducing the required grid number in calculation and improving the accuracy of the flow field near wake of turbine. The pressure distribution along the chord of hydrofoil with varying angles of attack was obtained by numerical calculation which was consistent with the experimental results. When the angle of attack was equal to 10.8, the pressure distribution around the hydrofoil obtained by 2D actuator surface model agreed well with the hydrofoil structure model. On these bases, the actuator surface model was extended from 2D to 3D, and the dynamic performance and near wake flow field structure of three blade tidal turbine were analyzed. The results show that the dynamic performance obtained by 3D actuator surface model is in good agreement with the experiment and actuator disc model. When the number of grid is similar, the actuator surface model can obtain more detail near wake flow field than the actuator disc model. The advantages of the actuator surface model for researching the dynamic performance and flow field are demonstrated.

关 键 词：水翼 潮流能水轮机 激面模型 数值模拟 

分 类 号：TV136.1[水利工程—水力学及河流动力学]