CFD analysis of NACA4415 airfoil with γ−Reθ model considering natural transition

• Main Authors: Islam, Mazharul, Langfeldt, Felix, Juretic, Franjo, Guerrero, Joel, Wood, David
• Format: Conference or Workshop Item
• Language: English; English
• Published: 2015
• Subjects: TL500 Aeronautics
• Online Access: http://irep.iium.edu.my/56603/1/2_Islam_etal.pdf; http://irep.iium.edu.my/56603/13/56603-edited.pdf; http://irep.iium.edu.my/56603/; https://vtechworks.lib.vt.edu/handle/10919/54667
• Institution: Universiti Islam Antarabangsa Malaysia

Airfoil analysis is essential to wind turbine aerodynamics. In typical operating conditions, airfoils undergo transition from laminar to turbulent flow in the boundary layer in a manner that must be modeled accurately to predict airfoil lift and drag. There are different modes of transition (e.g. natural, by-pass, wake induced, reversed, separated flow) and modeling them is not straight-forward. Over the years, diversified predictions have been developed for the various modes. One of the popular transition models is the local correlation-based $\gamma-Re_\theta$ model of Menter et al. \citep{Menter2004}. The model requires data correlations for the transition length and the critical Reynolds numbers.