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A porous media model for the numerical simulation of acoustic attenuation by perforated liners in the presence of grazing flows

Wang, Jianguo; Rubini, Philip; Qin, Qin


Jianguo Wang


In this paper, a novel model is proposed for the numerical simulation of noise-attenuating perforated liners. Effusion cooling liners offer the potential of being able to attenuate combustion instabilities in gas turbine engines. However, the acoustic attenuation of a perforated liner is a combination of a number of interacting factors, resulting in the traditional approach of designing perforated combustor liners relying heavily on combustor rig tests. On the other hand, direct computation of thousands of small-scale holes is too expensive to be employed as an engineering design tool. In recognition of this, a novel physical velocity porous media (PVPM) model was recently proposed by the authors as a computationally less demanding approach to represent the acoustic attenuation of perforated liners. The model was previously validated for the normal incidence of a sound wave by comparison with experimental data from impedance tubes. In this paper, the model is further developed for configurations where the noise signal propagates in parallel with the perforated liners, both in the presence and absence of a mean flow. The model is significantly improved and successfully validated within coexisting grazing and bias flow scenarios, with reference to a series of well-recognized experimental data.


Wang, J., Rubini, P., & Qin, Q. (2021). A porous media model for the numerical simulation of acoustic attenuation by perforated liners in the presence of grazing flows. Applied Sciences, 11(10), Article 4677.

Journal Article Type Article
Acceptance Date May 17, 2021
Online Publication Date May 20, 2021
Publication Date May 2, 2021
Deposit Date Apr 5, 2022
Publicly Available Date Apr 6, 2022
Journal Applied Sciences (Switzerland)
Electronic ISSN 2076-3417
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 11
Issue 10
Article Number 4677
Keywords Perforated liners; Acoustic damping; Porous media model; Acoustic passive control; Numerical simulation; Combustion instability; Effusion cooling walls
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Copyright Statement
Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.<br /> This article is an open access article distributed under the terms and<br /> conditions of the Creative Commons Attribution (CC BY) license (

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