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airfoil polar data extrapolation
Table of Contents 1. aifoil polar extrapolation 1.1. Reference 1 aifoil polar extrapolation NACA0012 cl cd data 1 naca0018 polar data 2 method 1 extrapolation can be done using Javafoil, or NREL's AirfoilPrep 3 based on Viternas method 4 Method 2 extrapolate cl, cd up to the stall delay angle using the method proposed by Snel et al. 5 . Further extrapolations beyond the stall delay angle were achieved using Viterna and Corrigan’s methodology for post stall predictions 6 . empirical correction used by batten 2008, University of Southampton Airfoil polars measured in the wind tunnel or simulated with XFOIL or other CFD software are usually limited to small and medium inflow angles (e.g. -20° to +20° AoA). However the blades of both VAWTs and HAWTs often operate at high inflow angles. In order for the BEM routines to converge and produce rea...
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