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首页> 外文期刊>Journal of Mechanical Science and Technology >Numerical studies on dynamic stall characteristics of a wind turbine airfoil
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Numerical studies on dynamic stall characteristics of a wind turbine airfoil

机译：风力涡轮机翼型动态失速特性的数值研究

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The present work delivers an evaluation of the S809 airfoil under static and dynamic conditions employing a computational fluid dynamics (CFD) approach. Pitching motions with three different mean angles of attack, 8 degrees, 14 degrees and 20 degrees, with a reduced frequency of 0.079 and amplitude of 10 degrees were imposed at a quarter chord position. Two widely used eddy-viscosity turbulence models, Spalart-Allmaras (SA) and Menter shear-stress-transport (SST), were tested to capture the static and dynamic behavior of the flow. A high order flux discretization, weighted essentially non-oscillatory (WENO) scheme was used in these computations to better resolve the detaching vortices. The results were validated against experimental data and an empirical correlation according to the Leishman-Beddoes model with reasonable agreement. The SA model gave the best prediction in the post-stall regime at high angles of attack. The pressure evolution and the flow field surrounding the airfoil in the onset of dynamic stall were presented and evaluated.
机译：本作者在采用计算流体动力学（CFD）方法的静态和动态条件下，提供了对S809翼型的评估。在四分之一的和平位置施加具有三个不同攻击的平均攻击角度，8度，14度和20度，减小频率为0.079的频率，并且在四分之一的弦位置施加。测试了两个广泛使用的涡流湍流模型，Spalart-Allmaras（SA）和导师剪切应力运输（SST），以捕获流动的静态和动态行为。在这些计算中使用了高阶通量离散化，加权基本上非振荡（Weno）方案，以更好地解决分离涡流。根据具有合理协议的Leishman-Beddoes模型，对实验数据和经验相关性验证了结果。 SA模型在高角度的攻击状态下给出了术后政权的最佳预测。提出并评估了动态失速开始围绕翼型的压力演化和流场。

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