Abstract This study puts forward an investigation into the hydrodynamic performance concerning a ducted, high-solidity tidal turbine utilising blade-resolved computational fluid dynamics. The model achieves similarity values of over 0.96 with experimentation data regarding a three-bladed horizontal-axis tidal turbine in validation of three distinct parameters: power & torque coefficient, thrust coefficient, and wake velocity profiles. Accordingly, the model was employed for the analysis of a ducted, high-solidity turbine in axially-aligned flows at distinct free-stream velocities. The resultant hydrodynamic performance characteristics portrayed a peak power coefficient of 0.34, with a thrust coefficient of 0.97, at a nominal tip-speed ratio of 1.75. Coefficient trend agreement was attained between the numerical model and experimentation data established in literature and blade-element momentum theory; the model furthers the analysis by elaborating the temporal hydrodynamic features induced by the fluid-structure interaction in specification to the wake formation velocity profiles, pressure distribution along the blades and duct, mass flow rate, and vortex shedding effects to establish the characteristic flow physics of the tidal turbine.

中文翻译：

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导管式高密实度潮汐涡轮机的数值性能分析

摘要 本研究利用叶片分辨计算流体动力学对导管式高固体潮涡轮机的流体动力学性能进行了研究。该模型与三叶水平轴潮汐涡轮机的实验数据在三个不同参数的验证中获得了超过 0.96 的相似值：功率和扭矩系数、推力系数和尾流速度剖面。因此，该模型用于分析具有不同自由流速度的轴向对齐流动中的管道式高密实度涡轮机。由此产生的水动力性能特征描绘了 0.34 的峰值功率系数，推力系数为 0.97，额定叶尖速比为 1.75。数值模型与文献中建立的实验数据和叶片元动量理论的系数趋势一致；该模型通过详细说明由流固耦合引起的时间流体动力学特征对尾流形成速度剖面、沿叶片和管道的压力分布、质量流量和涡旋脱落效应的时间流体动力学特征的进一步分析，以建立特征流物理潮汐涡轮机。