深水造流系统的垂向剖面流预报与流场特性分析

Prediction on Vertical Current Profiles and Flow Characteristics of Current Generation System in Deepwater Offshore Basin

采用CFD方法通过求解N-S方程和k-ω湍流模型对深水造流系统进行了时域数值模拟.为了研究深水试验池内垂向剖面流的分布,揭示海洋深水造流系统的流场特性,建立了造流系统的三维数值模型.采用多块结构化网格对计算区域进行离散.廊道与深水池之间生成非匹配的网格,并通过交界面的方式连接.同时对深水试验区域进行实测试验.对比分析表明,计算值与实测值吻合较好,利用CFD方法模拟造流系统是可行的;试验区域水流均匀,基本不存在横向速度,垂向剖面流满足试验要求,该造流系统性能良好.对整流器、进出水廊道、导流隔墙等周围的流场分布进行了数值预报,为今后进一步研究深水造流系统的流场特性、有效控制水池内的流速、提高造流系统的效率和有流工况下模型试验的精确度提供了参考.

Time domain method was used to simulate deepwater current generation system by solving N-S equation and k-ω turbulent model.Three dimensional model is created and calculated in order to investigate the distribution of vertical profile velocity in the test area,disclose the fluid characteristics of the current generation system.Multi-block structural grids are used to create domain meshes.Non-matching grids are created between culverts and deepwater basin which connect with interface method.The numerical result and full-scale measurement data fit a bit well through comparison,indicating CFD method is available in simulating Current generation system.Flow field is uniform and constant in test area,the distribution of vertical profile velocity meets test need,which indicates the performance of current generation system is pretty good.In addition,the flow distributions around containers,inflow and outflow galleries,turning vanes etc are also predicted by CFD methods.The results provide an important reference for further research on flow characteristic of current generation system,effectively adjusting the current velocities,increasing efficiency of current generation system and model test precision with current.