基于漂浮平台的潮流能水轮机阵列优化

Optimization of Tidal Current Turbine Array Based on a Floating Platform

为开展基于漂浮式电子信息平台的潮流能提取装置(水轮机)的布置方式优化研究,本文建立潮流与水轮机阵列及漂浮电子信息平台立柱相互作用的三维计算流体动力学(Computational Fluid Dynamics,CFD)模型,考虑漂浮平台水轮机组阵列并列和错列两种布置方案,分析立柱扰流对水轮机阵列流速的干扰和水轮机间尾流的相互影响,为后续的潮流能发电装置在海洋装备上的一体化设计提供数据支撑。对比分析结果表明:在设计流速0.8 m/s下,当来流角度达20°时,并列布置的平均功率系数下降35.97%,最小功率系数为0.023;而错列布置平均功率系数下降24.70%,最小功率系数为0.071。同时,结合水轮机组的设计流速下叶轮横截面流场速度分布图和水轮机尾流场水平面流速分布情况,水轮机阵列采用错列布置比并列布置布局方式更优,尾流效应影响更小,潮流能利用效率更高。

In order to carry out optimization research on the layout of the tidal current energy extraction device(turbine)based on a floating electronic information platform,this paper establishes a three-dimensional Computational Fluid Dynamics(CFD)model for the interaction between the tidal current,turbine array,and floating electronic information platform columns.Two layout schemes,parallel and staggered,are considered for the floating platform turbine array,Analyze the interference of column turbulence on the flow velocity of the turbine array and the mutual influence of wake between turbines,providing data support for the integrated design of subsequent tidal power generation devices in marine equipment.The comparative analysis results show that at a design flow rate of 0.8 m/s,when the inflow angle reaches 20°,the average power coefficient of the parallel arrangement decreases by 35.97%,and the minimum power coefficient is 0.023.However,the average power coefficient of the staggered arrangement decreases by 24.70%,and the minimum power coefficient is 0.071.At the same time,combining the velocity distribution diagram of the impeller cross-section flow field under the design flow rate of the water turbine unit and the horizontal velocity distribution of the tail flow field of the water turbine,the staggered layout of the water turbine array is better than the parallel layout,and the wake effect is less affected,resulting in higher efficiency in utilizing tidal current energy.