中国机械工程2017，Vol.28Issue(18)：2204-2208,5.DOI:10.3969/j.issn.1004-132X.2017.18.009
水平轴风力机的转矩性能及叶尖损失对其的影响
Torque Performance of Horizontal Axis Wind Turbines and Its Impacts of Blade Tip Losses
摘要
Abstract
This paper analyzed the mechanism of blade tip losses,and derived the blade chord for-mula according to PRANDTL and GLAUERT blade tip loss correction factor and blade element-mo-mentum theory.With the blade chord formula,an analytical expression of torque coefficient associated with tip speed ratio and airfoil lift drag ratio of wind turbines was deduced by integrating along the wingspan using the blade element-momentum theory,and highest torque coefficient value of wind tur-bines in any steady state was obtained,which might be used for pre-estimating torque coefficient of actual wind turbines in design.The research shows,the impacts of blade tip losses to chord concen-trated in the blade tip area,blade tip loss will reduce the torque coefficient about 4 to 10 percent when tip speed ratio changes from 10 to 4,and the value of the loss has minimal changes with lift drag ratio.关键词
风能利用/风力机/转矩系数/叶尖损失/叶素动量理论Key words
wind energy utilization/wind turbine/torque coefficient/blade tip loss/blade ele-ment-momentum theory分类
能源科技引用本文复制引用
姜海波,李艳茹,赵云鹏..水平轴风力机的转矩性能及叶尖损失对其的影响[J].中国机械工程,2017,28(18):2204-2208,5.基金项目
国家自然科学基金资助项目(51375489) （51375489）
