【摘要】 通过开展物理模型试验,探究波流共同作用下水平轴潮流能水轮机尾流场的流速变化和紊动特性。结果表明:相比于纯流工况,波浪的存在有利于支撑结构后方水流的速度恢复,但会使水轮机叶片旋转水域后方近尾流的速度损失更大,远尾流的速度恢复更慢;水轮机下游流速会随波高和周期的增加而增大;波流共同作用工况下的湍流强度整体高于纯流工况;湍流强度随波浪周期的增大而减小,随波高的增大而变大。更多还原

【Abstract】 Physical experiments were conducted in this study to investigate the flow velocity distribution and the turbulence characteristics in the wake of a horizontal axis tidal stream turbine under the combined action of wave and current. The results show that the existence of wave would contribute to the recovery of flow velocity behind the support structure. Compared with that under pure current,larger velocity deficit was observed within the swept area and slower velocity recovery rate was found in the far wake,when the model turbine operates under the combined action of wave and current. It’s also found that the flow velocity in the downstream of turbine would increase with the increasing of wave height and wave period. Meanwhile,turbulence intensity in the flow field under combined wave and current is generally higher than that under a pure current condition. In addition,turbulence intensity would decrease with the increasing of wave period,while would increase with the increasing of wave height.更多还原