风力机翼型气动力的雷诺数修正及其影响分析  

Reynolds number correction and effects analysis of wind turbine airfoils

作　　者：梁湿[1,2] 刘雄[2] 张林伟 李成良 张富海 

机构地区：[1]中材科技风电叶片股份有限公司,北京100092 [2]汕头大学工学院,广东汕头515063 [3]北京万源工业有限公司,北京100176

出　　处：《可再生能源》2015年第11期1658-1663,共6页Renewable Energy Resources

基　　金：国家高技术研究发展计划"863"计划(2012AA051302);国家自然科学基金项目(51276106);教育部高等学校博士点科研基金项目(20124402110005);教育部科学技术研究重点项目(212130)

摘　　要：目前,大型风力机翼型的运行雷诺数已经达到107量级,但高雷诺数下的气动数据普遍欠缺,也缺乏雷诺数效应对叶片的影响评估。文章结合翼型现有测试数据和Xfoil计算结果,以NACA63-421翼型为例,根据较低雷诺数下的气动力数据对较高雷诺数下的气动力数据进行了修正。分析了雷诺数对翼型升阻力特性、升阻比、前缘粗糙敏感性、转捩位置等气动特性的影响。根据翼型雷诺数修正方法对7.0 MW风力机叶片翼型气动力进行修正,依据不同雷诺数下修正的气动力数据对叶片进行了气动计算,发现不同雷诺数下叶片的最优运行点会发生改变,影响气动效率和载荷。因此,设计过程中需要充分考虑雷诺数对风力机叶片气动特性的影响。Although the operating Reynolds number of large-scale wind turbine airfoil has already reached 107 orders, the aerodynamic data at high Reynolds number is generally lacking. The paper take NACA63-421 for example,based on the experimental data at lower Reynolds number and the calculation results of Xfoil, the aerodynamic coefficients data at high Reynolds number is obtained. The effects of Reynolds number on the aerodynamic characteristics are also analyzed. According to the proposed method, the aerodynamic data of the airfoils of a 7.0 MW wind turbine were all calculated and the aerodynamic performance of the wind turbine were evaluated using aerodynamic data at different Reynolds numbers. The results indicate that the optimal operating point of the blade changes under different Reynolds numbers,which will affect the aerodynamic performance and blade loading. Therefore in the design stage,it is necessary to aerodynamic characteristics of wind turbine airfoils consider the effects of Reynolds number on the aerodynamic characteristics of wind turbine airfoils.

关 键 词：风力机 翼型 雷诺数 气动特性 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]