中文摘要：

浮潜式载体是一种创新性的潮流能水轮机载体形式,在设计时,需在保证其上浮下沉及拖航稳定性的同时,尽量减小载体结构形式对其所搭载水轮机的影响。采用计算流体力学方法对两种浮潜式载体结构形式下水轮机运行状态及流场流速分布进行研究,计算结果表明：浮潜式载体中有无坡度对于水轮机的功率系数与轴向力系数影响很大,功率系数在提高的同时,轴向力系数也相应的增加,因此在保证水轮机获能的同时,需要对结构进行稳定性校核;水轮机在额定流速条件下,浮潜式载体的存在对于水轮机上游流速有一定的加强作用,有坡度浮潜式载体因其导流聚流作用将流速提高0.4 m/s左右,更有利于水轮机获能和效率的提高。

英文摘要：

Buoyancy carrier is an innovative carrier form of tidal current energy turbine. During the design of the turbine, the stability of floating, sinking and towing should be ensured, while minimizing the influence of carrier form on its carried tidal turbine. The method of computational fluid dynamics is adopted to study the operational performance of the turbine and the distribution of fluid velocity under two different carrier forms. The results show that the gradient of buoyancy carrier has an important effect on the power coefficient and the axial force coefficient of the turbine. With increasing power coefficient, the axial force coefficient also increases accordingly.Therefore, while ensuring the turbine efficiency, it needs check the stability of the structure. Under the condition of rated flow velocity, the existence of buoyancy carrier reinforces the upstream flow velocity. The carrier with gradient will improve the flow velocity by 0.4 m/s owing to the function of stream guidance and focused fluid,which benefits energy capture and improves energy efficiency.