10kW风力机叶片翼型气动性能的模拟及其优化

SIMULATION OF AERODYNAMIC PERFORMANCE AND OPTIMIZATION OF AIRFOIL FOR 10kW WIND TURBINES BLADE

根据10kW风力机的工况,选取NREL中的S809翼型,分别采用Fluent软件和XFOIL法对其气动性能进行模拟分析,并将模拟结果与其风洞实验数据进行对比,结果显示XFOIL法具有更高的计算精度;根据叶片沿展长方向的不同要求,提出不同展长位置翼型的优化目标,采用XFOIL法中的反设计优化法,分别对不同位置的翼型进行优化;最后将优化后的翼型结构参数导入GH-Bladed软件,得到优化前后叶片风能利用系数与叶尖速比之间的关系,从而使优化后的翼型具有更宽的叶尖速比,叶片的气动性能得到改善,所得结果对10kW风力机叶片的设计具有指导意义。

Based on the operating characteristics of developed 10kW wind turbine, the $809 airfoil was chosen from NREL airfoil families, and simulation analysis of aerodynamic performance of $809 was carried out by using Fluent software and XFOIL method, respectively. The obtained simulation results were compared with the given wind tunnel test data. The comparison results show that XFOIL method has a higher accuracy. According to the different requirements of blade along the length direction, the corresponding optimal objection was presented. The optimization of airfoil structure was achieved by adopting the anti-design optimization method in XFOIL method. Finally, the optimized structural parameter of airfoil was imported in GH-Bladed software, and the relationship between blade tip speed ratio and wind energy utilization coefficient was built for optimizing airfoil. The optimized airfoil has a wider tip speed ratio, and the aerodynamic performance of blade is improved. The results have a guiding significance for blade design of 10kW wind turbine.