Rotor wake capture improvement based on high-order spatially accurate schemes and chimera grids

Abstract：A high-order upwind scheme has been developed to capture the vortex wake of a helicopter rotor in the hover based on chimera grids.In this paper,an improved fifth-order weighted essentially non-oscillatory (WENO) scheme is adopted to interpolate the higher-order left and right states across a cell interface with the Roe Riemarm solver updating inviscid flux,and is compared with the monotone upwind scheme for scalar conservation laws (MUSCL).For profitably capturing the wake and enforcing the period boundary condition,the computation regions of flows axe discretized by using the structured chimera grids composed of a fine rotor grid and a cylindrical background grid.In the background grid,the mesh cells located in the wake regions are refined after the solution reaches the approximate convergence.Considering the interpolation characteristic of the WENO scheme,three layers of the hole boundary and the interpolation boundary are searched.The performance of the schemes is investigated in a transonic flow and a subsonic flow around the hovering rotor.The results reveal that the present approach has great capabilities in capturing the vortex wake with high resolution,and the WENO scheme has much lower numerical dissipation in comparison with the MUSCL scheme. 作者： 徐麗[1]  翁培奮[2] Author： Li XU[1]  Pei-fen WENG[2] 作者單位： School of Mathematics and Physics, Shanghai University of Electric Power,Shanghai 200090, P. R. China;Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University, Shanghai 200072, P. R. China 期 刊： 應用數(shù)學和力學（英文版）   EISCI Journal： Applied Mathematics and Mechanics 年，卷(期)： 2011, 32(12) 分類號： V211.3 Keywords： hovering rotor,vortex wake    Navier-Stokes equation    chimera grid    weightedessentially non-oscillatory (WENO) scheme    機標分類號： TP3 O1 機標關鍵詞： background grid    upwind scheme    WENO scheme    numerical dissipation    boundary condition    conservation laws    helicopter rotor    high resolution    transonic flow    capabilities    performance    comparison    interface    improved    approach    results    three    paper    cells    based 基金項目： the National Natural Science Foundation of China Rotor wake capture improvement based on high-order spatially accurate schemes and chimera grids[期刊論文]  應用數(shù)學和力學（英文版） --2011, 32(12)徐麗  翁培奮A high-order upwind scheme has been developed to capture the vortex wake of a helicopter rotor in the hover based on chimera grids.In this paper,an improved fifth-order weighted essentially non-oscilla...

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