摘要
随着风电机组的发展,国内外对预弯叶片的研究日益增多,然而,预弯叶片复杂的几何形态也同时增大了气动性能分析误差,为其理论研究带来了挑战。本文开展了关于BEM计算预弯叶片气动特性的研究。在已有的三维预弯叶片几何模型的基础上,通过自编程序确定叶片的预弯曲线,将预弯曲线引入传统的BEM方法中,通过修正现有的BEM理论,改变入流角度和各叶素处受力情况,来获得预弯叶片更准确的气动性能。此外,针对不同风速范围,将叶尖损失修正因子划分为两个部分,采用Prandtl尖端损失模型和Shen尖端损失模型,从而更好地考虑到叶尖效应。结果显示,相较于传统方法,修正后的BEM方法误差明显缩小,精确度提高,为预弯叶片气动性能的快速计算提供了理论基础。
As wind turbine technology advances,research on pre-bent blades is increasing globally.However,the complex geometry of pre-bent blades also increases the error in aerodynamic performance analysis,posing challenges to theoretical research.This paper conducts research on the aerodynamic characteristics of pre-bent blades using BEM calculations.Based on the existing 3D geometric model of pre-bent blades,a self-developed program determines the pre-bending curve of the blade.This curve is then incorporated into the traditional BEM method,and by modifying the existing BEM theory,it alters the inflow angle and the force situation on each blade element to obtain more accurate aerodynamic performance of pre-bent blades.Moreover,for different wind speed ranges,the tip loss correction factor is divided into two parts,adopting the Prandtl tip loss model and the Shen tip loss model,to better account for the tip effect.The results show that compared to traditional methods,the error of the modified BEM method is significantly reduced,and its accuracy is improved,providing a theoretical basis for the rapid calculation of the aerodynamic performance of pre-bent blades.
作者
冯聿昊
王晓东
王立闻
曾涛
徐娜
FENG Yuhao;WANG Xiaodong;WANG Liwen;ZENG Tao;XU Na(Key Laboratory of Power Station Energy Transfer Conversion and System,Ministry of Education,North China Electric Power University,Beijing,102206,China;Dongfang Electric Corporation Science&Technology Research Institute Co.Ltd.,Chengdu,611731,China)
出处
《工程热物理学报》
北大核心
2025年第6期1891-1897,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目(No.52376180)
东方电气集团公司项目。
