基于数值波浪水槽的波力直驱水轮机前导流口体型优选

Configuration selection of front guide inlet for direct driving turbine based on numerical wave tank

基于数值波浪水槽和k-ε紊流模型,对3种不同体型的波力直驱水轮机前导流口的水力特性进行了三维数值模拟及分析,获得了最优的前导流口体型.根据物理水槽造波原理,在FLUENT中通过设定造波板边界的运动规律实现了三维规则波的数值模拟,所建立的数值波浪水槽工作特性良好,可得到稳定的、重复性很好的波动过程;通过后蓄水池自由水面波动幅值、过机流量和俘获宽度比等3项指标,对比分析了3种体型导流口的性能.

Front guide inlet is one of the most important parts of the wave direct driving turbine （DDT）. Based on the numerical wave tank （NWT） and the standard k-ε turbulence model, the hydraulic character- istics of three front guide inlets with different configurations are studied by using the commercial CFD soft- ware FLUENT. To obtain the highly stable and repeated waves, a three-dimensional numerical wave tank is established by utilizing the moving boundary method on the basis of linear theory of wave, and the vol- ume of fluid （VOF） method is used height, DDT＇s flow rate and capture to track the free surface. According width ratio, the performance of three to the back reservoir＇s surge front guide inlets is compared.