尾缘修剪对风力机翼型气动性能的影响  

Influence of Trailing Edge Trim on Aerodynamic Performance of the Wind Turbine Airfoil

作　　者：叶舟[1,2] 郝文星[1] 祖红亚[1] 李春[1,2] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海理工大学动力工程多相流动与传热重点实验室,上海200093

出　　处：《动力工程学报》2015年第7期593-598,604,共7页Journal of Chinese Society of Power Engineering

基　　金：上海市研究生创新基金资助项目(JWCXSL1402);上海市教育委员会科研创新资助项目(13YZ066);国家自然科学基金资助项目(E51176129)

摘　　要：对S809和S805 2种厚度不同的翼型进行尾缘修剪,采用翼型设计分析软件Xfoil对修剪前后翼型的气动性能进行计算,研究了不同程度尾缘修剪对翼型气动性能的影响,并采用CFD数值模拟方法进行流场特性分析.结果表明:尾缘修剪后会引起翼型在附着流区升力系数减小,最大升阻比减小,减小程度随着修剪程度的增加而加剧;对于厚度不同的翼型,尾缘修剪对其影响的主要区别在于失速区较厚翼型阻力系数减小,较薄翼型升力系数增大;翼型表面压力系数因尾缘修剪而发生改变,较厚翼型压力分布变化较为明显;尾缘修剪对尾流的扰动会影响翼型表面其他部位的流动,进而影响翼型气动性能.The S809 and S805 two airfoils with different relative thickness were trimed on the trailing edge, of which the aerodynamic perfomance was calculated by using the analysis and design software Xfoil before and after trimming, so as to study the influence of trailing edge trim in different degrees on aerodynamic performance of the airfoil, and to analyze the flow field characteristics using CFD. Results show that the lift coefficient and the maximum lift-to-drag ratio of airfoil with trimmed trailing edge reduce in attached flow area, and the reducing gradient increases with the trimming degree. The influence of trailing edge trim is different for airfoils with different relative thickness, and in the stall zone, drag coefficient of thic- ker airfoil decreases, and lift coefficient of thin airfoil increases. The pressure coefficient of airfoil surface is changed by trailing edge trim, and the pressure coefficient of thicker airfoil is changed obviously. The wake disturbance caused by trailing edge trim will extend to other surface, and thus affect the aerodynamic characteristics of the airfoil.

关 键 词：风力机 翼型 气动性能 尾缘修剪 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]