水平轴潮流能水轮机耦合运动水动力分析

漂浮式潮流能装置载体的波浪运动响应使水平轴水轮机的水动力特性发生变化,采用滑移网格技术对无界均匀来流中水轮机发生横摇和纵摇耦合运动时的三维水动力特性进行研究.结果表明:水轮机轴向载荷和能量利用率瞬时值产生波动,且横摇和纵摇耦合运动时轴向载荷及能量利用率的计算结果与只发生纵摇运动的计算结果基本相同;横摇和纵摇耦合运动时横摇力矩计算值的波动幅值比只发生横摇运动时的大;横摇和纵摇耦合运动时纵摇力矩的计算值与只发生纵摇运动时的计算值存在差异,横摇频率越大,差异越明显.研究结果可为漂浮式载体的运动响应研究、水轮机的结构设计及电能控制等提供相关数据.

Coupling Motion Hydrodynamic Analysis of Horizontal Axis Tidal Turbine

Abstract： Under the condition of actual sea state, the hydrodynamic characteristic of floating horizontal axis turbine is related to wave characteristics and floating carrier wave motion response. Slipping mesh is used in this study to analyze the hydrodynamic characteristic in uniform stream when the turbine is forced to produce roll and pitch coupling movement. Results show that the turbine axial load and energy utilization ratio fluctuates, and the calculation results in coupling motion and in pitching motion only are basically identical. The fluctuation amplitude of calculated rolling torque in coupling motion is bigger than that in rolling motion only. The difference of pitching torque between coupling motion and pitching motion only is highly dependent on the rolling frequency. Results of this study can provide reference for the study of motion response of floating carrier for floating tidal current turbine system. Structural design of turbine and control of the electric output.