基于风能利用效率的叶片根部翼型尾缘加厚优化方法研究  

Study on optimization method of thicken blade root airfoil trailing edge based on wind energy efficiency

作　　者：张思达 孙文磊[1] 张建杰[1] 曹莉[1] 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047

出　　处：《可再生能源》2018年第2期309-316,共8页Renewable Energy Resources

基　　金：国家自然科学基金项目(51565055)

摘　　要：针对兆瓦级风力发电机在实际工作中叶片根部载荷大、强度高、对空气利用效率低等问题进行研究。结合叶素-动量理论和普朗特叶尖损失因子修正方法,设计了一个额定功率为5 MW的叶片;采用对称加厚法对叶片根部处翼型的尾缘进行加厚优化,并对优化前后翼型进行数值分析。分析结果表明,经过对称加厚优化的翼型升力系数大于原翼型,用新翼型设计的叶片表面静压强分布比原叶片表面静压强分布更均匀,新叶片功率增加,提升了叶片风能利用效率。新型叶片符合设计要求,为研究钝尾叶片气动特性提供了理论基础。For root of megawatt level wind turbine in the actual work faced large load,high strength,and low efficiency of air,studying on these problems combined with blade element momentum theory and Prandtl tip loss factor correction method,designed a 5 MW blade,and use the method of symmetric thickening airfoil trailing edge of blade root thickening optimization. The effect of aerodynamic performance for the blades was analyzed by the numerical analysis. The analysis results show that the optimized symmetric thickening of the airfoil,s lift coefficient is larger than the original airfoil,using new type design of blade surface static pressure intensity distribution is better than the original blade surface static pressure distribution more uniform, new blade power increased,raised the blade wind energy use efficiency,a new blade comply with the design requirements. This paper provides a theoretical basis for the study of the aerodynamic characteristics of blunt tail blades.

关 键 词：发电机叶片 根部翼型 尾缘加厚 数值分析 风能利用效率 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TH122[机械工程—机械设计及理论]