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research-article

A unified methodology to evaluate the radiated noise due to turbulent boundary layer flows

[+] Author and Article Information
Sylvain Morilhat

ONERA-DMPE, 2 Avenue E. Belin, 31000 Toulouse, France
sylvain.morilhat@onera.fr

François Chedevergne

ONERA-DMPE, 2 Avenue E. Belin, 31000 Toulouse, France
francois.chedevergne@onera.fr

Frank Simon

ONERA-DMPE, 2 Avenue E. Belin, 31000 Toulouse, France
frank.simon@onera.fr

1Corresponding author.

ASME doi:10.1115/1.4041611 History: Received April 26, 2018; Revised September 25, 2018

Abstract

For vibro-acoustic applications, a turbulent wall pressure fluctuations model was derived. The model is based on the resolution of the Poisson equation. The pressure is characterized in time and space through its spectrum in the pulsation wave-number domain. The developed model follows trends commonly observed using Corcos model in a large pulsation range but also shows new behaviours for low and high pulsations. The radiated noise due to turbulent wall pressure fluctuations is then computed in accordance with the form of the turbulent wall pressure spectrum. A specific computational methodology is proposed to perform the calculation without introducing limiting hypothesis on the radiated impedance.

Copyright (c) 2018 by ASME
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