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

Islam, Mazharul and Langfeldt, Felix and Juretic, Franjo and Guerrero, Joel and Wood, David (2015) CFD analysis of NACA4415 airfoil with γ−Reθ model considering natural transition. In: North American Wind Energy Academy (NAWEA) 2015 Symposium, 9th-11th June 2015, Virginia, USA.

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## Abstract

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.

Item Type: Conference or Workshop Item (Slide Presentation) 7416/56603 Airfoil analysis, natural transition T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics Kulliyyah of Engineering > Department of Mechanical Engineering Dr. Mazharul Islam 21 Apr 2017 11:30 25 Apr 2017 10:29 http://irep.iium.edu.my/id/eprint/56603