Laboratoire de Mécanique des Fluides et d'Acoustique - UMR 5509

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Accueil > Actualités > Séminaires > Archives 2018

Stephane Moreau - Chair Adopsys - LMFA

Turbomachinery noise prediction : present and future

Vendredi 28 septembre 2018, 11h, ECL, Bat. W1, Amphi 201

Turbomachinery noise prediction : present and future

A review of analytical models and numerical methods to yield both tonal and broadband contributions of noise sources is presented. The former rely on hybrid methods coupling analytical gust responses and acoustic analogies. The latter yields tonal noise with unsteady Reynolds-Averaged Navier-Stokes (u-RANS) simulations, and broadband noise with Large Eddy Simulations (LES). The analytical models are shown to provide good and fast first sound estimates at pre-design stages, and to easily separate the different noise sources. The u-RANS simulations provide accurate estimates of tonal noise of the most complex asymmetric, heterogeneous fan-OGV configurations. Wall-modeled LES are shown on all turboengine components : a low-pressure compressor stage, a transonic high-pressure turbine stage and a fan-OGV configuration with good overall sound power level predictions for the latter. In this case, hybrid Lattice-Boltzmann /very large-eddy simulations also appear to be an excellent alternative to yield both contributions accurately at once.


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