Vibroacoustic simulations with non-homogeneous TBL excitations: Synthesis of wall pressure fields with the Continuously-varying Uncorrelated Wall Plane Waves approach - Archive ouverte HAL Access content directly
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Vibroacoustic simulations with non-homogeneous TBL excitations: Synthesis of wall pressure fields with the Continuously-varying Uncorrelated Wall Plane Waves approach

Corentin Guillon
Emmanuel Redon
Laurent Maxit

Abstract

In this paper, a numerical method is presented to predict the vibroacoustic response of a vibrating structure excited by a spatially inhomogeneous turbulent boundary layer. It is based on the synthesis of different realizations of random pressure fluctuations that can be introduced as loadings of a vibroacoustic model (such as a finite element model). The vibro-acoustic response is finally deduced by averaging the responses for the different loads. To generate the pressure fluctuations of the non-homogeneous turbulent boundary layer, the Uncorrelated Wall Plane Wave (UWPW) approach used so far for homogeneous boundary layers is extended. On a first step, this extension is based on a decomposition of the excited surface into sub-areas and on the averaged parameters of the boundary layer on each sub-area. In a second step, it consists in considering the interaction between the sub-areas and a refinement of the sub-area decomposition. This leads to the Continuously-varying Uncorrelated Wall Plane Waves (C-UWPW) approach. The accuracy of the proposed approach is investigated on a rectangular panel of variable thickness and excited by a growing turbulent boundary layer triggered at one edge of the plate. Comparisons with the spatial approach, usually used but with very long computation times, are presented. The interests of the proposed approach in terms of accuracy and computation time are discussed. An illustration of the proposed approach to predict the radiated noise from a blade immersed in a water flow will be proposed during the oral presentation.
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Dates and versions

hal-03763471 , version 1 (29-08-2022)

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  • HAL Id : hal-03763471 , version 1

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Corentin Guillon, Emmanuel Redon, Laurent Maxit. Vibroacoustic simulations with non-homogeneous TBL excitations: Synthesis of wall pressure fields with the Continuously-varying Uncorrelated Wall Plane Waves approach. Internoise 2022, Aug 2022, Glasgow, United Kingdom. ⟨hal-03763471⟩
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