竖轴潮流能水轮机群数值模拟研究

NUMERICAL INVESTIGATION OF VERTICAL TIDAL TURBINE ARRAYS

为了实现竖轴潮流能水轮机群的优化布置,基于CFD方法分别对单排和双排水轮机群进行数值模拟。对于单排水轮机群排布,水轮机只有相互十分靠近时其输出效率才会得到显著提升,而相邻水轮机相对旋转方向对机群的效率无影响。对于双排水轮机群排布,下游水轮机会使上游水轮机的尾流变窄、流速加快,但对上游水轮机的效率无影响。合理选择上游水轮机的间距可提高下游水轮机的效率,优化的双排水轮机群排布方案大幅提升了整个机群的效率。

Several cases of vertical tidal turbine arrays were simulated using a CFD method to propose a good farm con- figuration. Single row cases give great higher power coefficient than a stand-alone turbine when turbines close to each oth- er. It also showed that the output power is insensitive to direction of turbine rotation. For two rows of turbines, the wake of the upstream turbine becomes narrow and fast when it goes through the downstream turbines. The downstream turbines do not affect the output of the upstream turbine. It suggests that 2-row arrays would offer a more favorable arrangement and optimized separation can increase the total output of turbines largely.