Rotor wake capture improvement based on high-order spatially accurate schemes an

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9~2x/Pe|0Rotor wake capture improvement based on high-order spatially accurate schemes and chimera grids

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/j}uDX%w0Abstract: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.

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作者:

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_~ ` E!Of0徐丽[1]翁培奋[2]水利论文U _GA;Yk(r\j

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Li XU[1] Pei-fen WENG[2]水利论文$` jM"y rm"T r

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作者单位:

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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

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0X/WXX%gb0应用数学和力学(英文版)

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jP\k&T'B4GI7~0Journal:

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Applied Mathematics and Mechanics水利论文$KG`k ^U

*C2v l&_rnV0年,卷(期):

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2011, 32(12)水利论文a o.FQB

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分类号:水利论文~/wf6iC+ra

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0h8g5b(^%SOu)NJV1r0Keywords:水利论文8h%JGy|#\|

A/OIgrE)g ga!o0hovering rotor,vortex wake

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Navier-Stokes equation水利论文 }t!q{"tH

JsR&w X0}r]k!ukQ6^0chimera grid

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o_FKt0weightedessentially non-oscillatory (WENO) scheme

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机标分类号:

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P@8O9~-t%Xu x0background 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

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基金项目:

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b){I1o7`!z4v0the National Natural Science Foundation of China水利论文+P%kx1vG4`tJq;|4C8t

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