风力机翼型三维气动力特性CFD模拟
首发时间:2013-09-11
摘要:本文针对某新型风力机专用翼型,采用CFD方法对其在三维条件下的气动力特性进行模拟,并将CFD计算结果与二维条件下及风洞试验所得到的气动力参数进行对比。比较结果表明,此风力机专用翼型的气动力特性具有比较明显的三维效应。叶片斜率和扭角的变化都会减小翼型的最大升力系数。三维模型随着扭角的增大,最大升力系数逐渐减小。与风洞试验结果相比,本文采用三维模型模拟的风力机升力系数偏小,阻力系数偏大。与二维模型相比,三维模型得到的最大升力系数更接近风洞试验的结果,但是阻力系数比二维模型的偏大。
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CFD simulation of 3D aerodynamic characteristics of a wind turbine airfoil
Abstract:In this paper, we use CFD method to calculate the 3D aerodynamic characteristics of a wind turbine airfoil. Due to its efficiency and accuracy, the S-A turblence model was used in the 3D CFD simiulation. The calculated results wsa compared with wind tunnel test data. Results show that the aerodynamic characteristics of wind turbine airfoil have noticeable three-dimensional effect, Twist angle and the slop of the 3D model have significant influence on the aerodynamic characteristic. The maximum lift coefficient decrease with the increase of twist angle. The maximum lift coefficient obtained from the two-dimensional model is smaller than three-dimensional model.
Keywords: CFD method wind turbine airfoil 3D aerodynamic force
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