NREL 5 MW风力机叶片外部翼型结冰模拟

ICING SIMULATION OF AIRFOIL OF NREL 5 MW WIND TURBINE BLADE

该文首先建立欧拉法水滴收集系数模型和风力机叶片翼型结冰模型,并以NACA0012翼型结冰算例验证该模型的有效性,而后开展NREL 5 MW风力机叶片外部翼型(NACA64618)结冰数值模拟,对风速、液态水含量和水滴直径等参数在结冰速率的影响方面进行了讨论。数值模拟结果表明:随攻角增大,NACA64618翼型结冰区域移向压力面,结冰厚度增加(最大增加量约为167%);增大风速、液态水含量和水滴直径均加剧NACA64618翼型结冰,结冰区域扩大、结冰量与结冰厚度增加。

In this paper,the Euler method water droplet collection coefficient model and the airfoil icing model are established,and the NACA0012 airfoil icing calculation example is used to verify the effectiveness of the model.The numerical simulation of NREL 5 MW wind turbine blade outer airfoil icing(NACA64618)is carried out.The effects of wind speed,liquid water content and droplet diameter on the icing of the airfoil are studied.The numerical simulation results show that with the increase of the angle of attack,the icing area of NACA64618 airfoil moves towards the pressure surface,and the icing thickness increases(the maximum increase is about 167%).The increase of wind speed,liquid water content and droplet diameter can all aggravate the icing of NACA64618 airfoil,and increase the icing area,icing amount and icing thickness.