空气动力学学报Issue(2)：246-253,8.DOI:10.7638/kqdlxxb-2013.0025
基于自由涡方法的风轮偏航气动特性研究
Aerodynamic characteristics of HAWT rotor in crosswind based on free vortex method
摘要
Abstract
In order to study the aerodynamic characteristics of HAWT rotor under yawed conditions with shear wind,an unsteady numerical simulation method is developed.It consists of a nonlinear lifting line method and a time—accurate free vortex method.To improve the conver—gence of the nonlinear lifting line method,an iterative algorithm,based on Newton—Raphson method,is used to solve the circulation equations.In order to improve the accuracy and the effi—ciency of the algorithm for rotor wake simulation,an improved wake vortex model is developed, which includes a viscous vortex core model,a vortex sheet model and a tip vortex filaments mod—el.The NREL Phase VI and Tjæreborg wind turbines are taken as the testing examples.The aerodynamic loads of both the rotor and the blades are computed under different yawed conditions with uniform wind or the shear wind.The results are compared to the experimental data.The key factors and the rules of the aerodynamic characteristics of the rotor and the blades are ana—lyzed.The results show that the method developed in this paper can simulate the aerodynamic characteristics of HAWT effectively under the yawed conditions with shear wind.The fluctua—tions of shaft torque of blades are increased;the fluctuations of flap moment of blades are de—creased at the plus yaw angles and increased at the minus yaw angles.关键词
风轮/风切变/偏航风/非定常模拟/自由涡Key words
HAWT rotor/shear wind/yaw wind/unsteady numerical simulation/free vor-tex method分类
能源科技引用本文复制引用
仇永兴,康顺..基于自由涡方法的风轮偏航气动特性研究[J].空气动力学学报,2015,(2):246-253,8.基金项目
国家自然科学基金 （）
