Modification of Spalart-Allmaras Turbulence Model for Predicting S825 Airfoil Aerodynamic Performance
In this paper, a 2-D numerical simulation of the wind turbine S825 airfoil is conducted with Spalart-Allmaras (SA) turbulence model at different attack angles. By comparing with experimental data, a novel method of modifying SA model is proposed. The key parameter in SA turbulence model is set with different values in the non-separating region and separating region divided by separating point respectively. This method improves the predictive accuracy of SA turbulence model when the airfoil works at stall conditions.
X.D. Yu, M.Y. Zhang, M.Q. Zhu, K.H. Xu and Q.C. Xiang
H. Yan et al., "Modification of Spalart-Allmaras Turbulence Model for Predicting S825 Airfoil Aerodynamic Performance", Applied Mechanics and Materials, Vols. 543-547, pp. 189-194, 2014