为减缓流动分离对垂直轴风力机的影响,在叶片尾缘采用后退襟翼,采用不同的后退控制策略,旨在改善垂直轴风力机的气动性能。使用CFD软件STAR CCM+对垂直轴风力机叶片进行二维数值模拟,研究不同尖速比下后退策略对风力机的风能利用率、叶片平均力矩以及流动特性等的影响。研究结果显示:在最佳尖速比前后,风能利用率得到显著提高,在2.5尖速比下较原始风力机提高38.7%。此外,采用后退襟翼的叶片具有更大的失速攻角,失速现象被延迟并在较高攻角时才发生。

This article studies a new design scheme for vertical axis wind turbines, which uses a backward flap on the blades. By adopting different backward control strategies, the aim is to improve the aerodynamic performance of vertical axis wind turbines. A two-dimensional numerical simulation of vertical axis wind turbine blades was conducted using CFD software star CCM+, and the effects of different tip speed ratios on wind energy utilization, blade average torque, and flow characteristics of the wind turbine were studied. The research results show that before and after the optimal peak speed ratio, the wind energy utilization coefficient has been significantly improved, thereby improving the self-starting ability of wind turbines. In addition, blades with backward flaps have a larger stall angle of attack, and stall phenomena are delayed and only occur at higher angles of attack.

国家自然科学基金(51976131；51676131)；上海“科技创新行动计划”地方院校能力建设项目(19060502200)