基于升力线理论的大型风力机气弹响应研究  

Aeroelastic Response Model of Large Wind Turbine Blade Based on Lift Line Theory

作　　者：黄维 李德源[1] 吴俊霖 HUANG Wei;LI De-yuan;WU Jun-lin(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《新能源进展》2022年第3期195-202,共8页Advances in New and Renewable Energy

摘　　要：针对风力机不断向大型化发展的趋势,导致结构柔度增加,气弹耦合特性和振动增强,研究了大型风力机高效精确的气弹响应分析方法。为了更准确模拟大型风力机气流沿叶片展向的三维流动现象,采用螺旋尾涡升力线模型代替传统叶素动量理论,建立了叶片气动载荷分析模型,进而结合风力机多体系统动力学模型,构建了机组的气弹耦合动力学方程和数值求解方法。以某10 MW风力机叶片为例,研究了稳态风况下不同风速的叶片气动性能,以及有效攻角、切向力等沿叶展方向的分布特点,并与采用修正叶素动量理论的气弹分析程序(HAWC)对比,结果表明,升力线理论无需引入经验修正模型即能获得叶素动量理论经修正后的分析精度。最后,通过非稳态风况下风力机的气弹响应分析,证明本文方法对大型风力机气弹耦合分析的有效性和准确性。In view of the continuous development trend of large-scale wind turbine, which leads to the increase of structural flexibility, aeroelastic coupling characteristics and vibration, an efficient and accurate aeroelastic response analysis method of large-scale wind turbine was studied. In order to more accurately simulate the three-dimensional flow phenomenon of large-scale wind turbine airflow along the spanwise direction of the blade, the spiral tail vortex lift line model was used to replace the traditional blade element momentum theory, and the blade aerodynamic load analysis model was established. Then, combined with the multi-body system dynamic model of wind turbine, the aeroelastic coupling dynamic equation and numerical solution method of wind turbine were constructed. Taking a 10 MW wind turbine blade as an example, the aerodynamic performance of the blade with different wind speeds under steady-state wind conditions, as well as the distribution characteristics of effective angle of attack and tangential force along the blade span direction were studied. Compared with the aeroelastic analysis program(HAWC) using modified blade element momentum theory, the results showed that the modified analytical accuracy of blade element momentum theory can be obtained by lift line model without introducing empirical correction model. Finally, through the aeroelastic response analysis of wind turbine under unsteady wind conditions, the effectiveness and accuracy of this method for aeroelastic coupling analysis of large wind turbine were verified.

关 键 词：风力机 气动模型 升力线模型 气弹响应 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]