20kw定桨距风力机叶片优化设计-农业机械学报.pdfVIP

20 1 1年5 月 农 业 机 械 学 报 第42 卷 第5 期 20kW定桨距风力机叶片优化设计* 刘占芳摇 周振凯摇 邓智春 (重庆大学资源及环境科学学院,重庆400044) 摇 摇 揖摘要铱摇 以设计攻角作为变量,在不超过额定功率和基本运行风速范围内,考虑风场风速的概率分布,建立了 以年发电量最大为目标的优化模型,采用遗传算法对20kW定桨距风力机叶片外形进行了优化设计。 通过对3 叶 片定桨距20kW风力机的气动性能评价以及与NREL 的同型风力机的对比表明,优化后的风力机具有更好的气动 性能,表明了该优化方法在设计定桨距风力机中的优越性。 关键词:定桨距摇 风力机摇 叶片摇 优化设计摇 主动失速摇 遗传算法 中图分类号:TK83 文献标识码:A 文章编号:1000鄄1298(2011)05鄄0121鄄04 Optimal Design on20kW Constant鄄pitch Wind Turbine Blades Liu Zhanfang摇 Zhou Zhenkai摇 Deng Zhichun (College of Resource and Environmental Sciences,Chongqing University,Chongqing 400044,China) Abstract A method of making design attack angles as a variable was presented. Considering the wind speed probability distribution of windfarm,an optimization modelwith the objective of maximum annual energy production was established in the range of rated power and basic operating wind speed. The blade geometry of a20 kW constant鄄pitch wind turbine was optimized by using genetic algorithm according to the model. Through the evaluation of the aerodynamic performance of20kW constant鄄pitch wind turbine and the comparison with the same type wind turbine of NREL,the results showed that optimized wind turbine had a better aerodynamic performance,which illustrated the advantages of the method in the design process of constant鄄pitch wind turbine. Key words摇 Constant鄄pitch,Windturbine,Blades,Optimal design,Active stall,Genetic algorithm 发电量最大。 因此现代定桨距风力机的设计很少采 摇 摇 引言 用上述两种方法。 定桨距风力机的叶片与轮毂固定连接,风速变 现代定桨距风力机的叶片设计考虑了风场风速 化时,桨叶的桨距角不能随之变化,因而,定桨距风 的概率分布,设计目标为满足额定功率的要求下,年