Predicting 2D Airfoil and 3D Wind Turbine Rotor Performance using a Transition Model for General CFD Codes
Predicting 2D Airfoil and 3D Wind Turbine Rotor Performance using a Transition Model for General CFD Codes
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DOI：
10.2514/6.2006-395
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发表时间：
2006-01
期刊：
影响因子：
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通讯作者：
R. Langtry;Jan Gola;F. Menter
中科院分区：
文献类型：
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作者：
R. Langtry;Jan Gola;F. Menter
*†‡开发了一个新的基于相关性的过渡模型，该模型严格建立在局部变量之上。因此，过渡模型与非结构化网格和大规模并行执行等现代CFD技术兼容。该模型基于两个输运方程，一个是间歇性输运方程，另一个是以动量厚度雷诺数表示的转折开始判据。所提出的输运方程并不试图模拟转折过程的物理模型(与湍流模型不同)，而是形成了将转折关联应用到通用CFD方法中的框架。该过渡模型最初是针对叶轮机械和航空流动而建立的。本文的主要目的是验证用于风力机过渡预测的模型。本文完成了二维S809翼型和全三维风力机转子(使用S809翼型)的全湍流和过渡计算。过渡结果与实验数据吻合较好，过渡模型可以很好地适用于风力机气动特性的预测。
*† ‡ A new correlation-based transition model has been developed, which is built strictly on local variables. As a result, the transition model is compatible with modern CFD techniques such as unstructured grids and massively parallel execution. The model is based on two transport equations, one for intermittency and one for a transition onset criterion in terms of momentum thickness Reynolds number. The proposed transport equations do not attempt to model the physics of the transition process (unlike e.g. turbulence models), but form a framework for the implementation of transition correlations into general-purpose CFD methods. The transition model was initially developed for turbomachinery and aeronautical flows. The main goal of the present paper is to validate the model for predicting transition on wind turbines. In this paper, fully turbulent and transitional computations of the 2D S809 airfoil along with a full 3D wind turbine rotor (that uses the S809 airfoil) have been accomplished. The transitional results are in good agreement with the experimental data and the transition model would appear to be well suited for the prediction of wind turbine aerodynamics.