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- W2118756981 abstract "DOI: 10.2514/1.43401 In the framework of unsteady aerodynamics, forced-harmonic-motion simulations can be used to compute unsteady loads. In this context, the present paper assesses two alternatives to the unsteady Reynolds-averaged Navier–Stokes approach, the linearized unsteady Reynolds-averaged Navier–Stokes equations method, and the harmonic balance approach. The test case is a NACA 64A006 airfoil with an oscillating flap mounted at 75% of the chord. Emphasis is put on examining the performances of the methods in terms of accuracy and computational cost over a range of physical conditions. It is found that, for a subsonic flow, the linearized unsteady Reynolds-averaged Navier–Stokes method is the most efficient one. In the transonic regime, the linearized unsteady Reynolds-averaged Navier–Stokes method remains the fastest approach, but with limited accuracy around shocks, whereas a oneharmonic harmonic balance solution is in closer agreement with the unsteady Reynolds-averaged Navier–Stokes solution.Inthecaseofseparationinthetransonicregime,thelinearizedunsteadyReynolds-averagedNavier–Stokes method fails to converge, whereas the harmonic balance remains robust and accurate." @default.
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- W2118756981 date "2010-04-01" @default.
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- W2118756981 title "Contrasting the Harmonic Balance and Linearized Methods for Oscillating-Flap Simulations" @default.
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- W2118756981 doi "https://doi.org/10.2514/1.43401" @default.
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