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Propagation des ondes acoustiques dans les turbomachines à écoulement subsonique

Abstract : Today, manufacturers are confronted with deal of designing turbomachinery with both high performance and low noise level. It is therefore necessary to accurately predict the sound field generated by these machines. The purpose of this work is to develop 2D-solver able to predict effectively the propagation of acoustics waves (noise) generated by subsonic turbomachinery, the studied machine is a centrifugal fans made up of an impeller and a diffuser. According to this challenge, development of higher order methods is requested, the finite volume method is used with application of Moving Last Square reproducing Kernel approximation to solve Linearized Euler Equations around a known stationary mean flow, here a pseudo mass matrix is defined and used to preserve the residuals order and a fully implicit time integration procedure is employed with suite of nonlinear and differential/Algebraic equation solvers using preconditioned matrix GMRES (Generalized Minimal RESidual) methods. The proposed method allows the direct reconstruction of fluxes using compact stencils, without introducing new degrees of freedom, which is a real advantage over the most popular existing high-order methods.
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Submitted on : Monday, January 3, 2011 - 11:29:33 AM
Last modification on : Wednesday, September 28, 2022 - 5:51:33 AM
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  • HAL Id : pastel-00551289, version 1


Hakim El Hadjen. Propagation des ondes acoustiques dans les turbomachines à écoulement subsonique. Acoustique [physics.class-ph]. Arts et Métiers ParisTech, 2010. Français. ⟨NNT : 2010ENAM0061⟩. ⟨pastel-00551289⟩



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