基于强迫振动和自由振动的风力机翼型涡激振动数值研究  

Numerical Study on Vortex-induced Vibration of Wind Turbine Airfoil via Prescribed Vibration and Free Vibration

作　　者：李羽 柳灿 连波 竺晓程[1] LI Yu;LIU Can;LIAN Bo;ZHU Xiaocheng(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程学报》2024年第2期270-276,共7页Journal of Chinese Society of Power Engineering

基　　金：上海市科技创新行动计划资助项目(20dz1205300)。

摘　　要：基于动网格技术,分别采用强迫振动和自由振动方法对90°攻角下风力机翼型的涡激振动现象进行了数值研究。通过强迫振动计算方法,确定了Du96-W-180风力机翼型在不同振幅下的涡振区间,并比较了改变来流速度和改变结构刚度对涡振区间的影响;通过自由振动计算方法,获得了不同来流速度下的翼型涡振区间,对比了频率比r=0.93和r=1.11时不同结构阻尼对翼型振动响应的影响,分析了翼型涡振的发展和演化过程。结果表明:改变来流速度和改变结构刚度时不同频率比下的涡振区间基本一致;自由振动数值计算验证了强迫振动的涡振区间;不同频率比下6%结构阻尼比时翼型振动出现涡激振动和强迫振动2种形式。Based on the dynamic mesh technique,the vortex-induced vibration of wind turbine airfoil at 90°angle of attack was numerically studied by using the prescribed vibration method and the free vibration method respectively.Through the prescribed vibration calculation method,the vortex-induced vibration range of Du96-W-180 wind turbine airfoil at different amplitudes was determined,and the effects of changing the incoming flow velocity and changing the structural stiffness on the vortex-induced vibration range were compared.Through the free vibration calculation method,the vortex-induced vibration range of the airfoil at different inflow speeds was obtained.The influence of different structural damping on the vibration response of the airfoil at the frequency ratio r=0.93 and r=1.11 was compared,and the development and evolution process of the vortex-induced vibration of the airfoil were analyzed.Results show that vortex-induced vibration range at different frequency ratios is basically the same while changing incoming flow velocity and changing the structural stiffness.The free vibration numerical simulation verifies the vortex-vibration range of the forced vibration.When 6%structural damping is applied at different frequency ratios,the vibration of the airfoil exhibits two forms:vortex-induced vibration and forced vibration.

关 键 词：风力机翼型 涡激振动 气动弹性 结构阻尼 锁频 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]