Numerical study of airfoil tonal noise reduction using segmented elastic panel configuration

Arif Irsalan, Garret C.Y. Lam, Randolph C.K. Leung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

In this paper a passive method for airfoil tonal noise reduction using segmented elastic panel airfoil configuration is proposed. Numerical investigation using perturbation evolution method is carried out at a low chord based Reynolds number of 5 × 104, Mach number of 0.4 and an angle of attack of 5. The approach of employing a resonant elastic panel on the airfoil surface has shown promising tonal noise reduction potential up to 2.1 dB. The idea is extended in the present study by employing multiple segmented elastic panels on the airfoil surface based on the localized flow characteristics over the airfoil surface. Five different panel configurations are designed and their effectiveness in terms of tonal noise reduction is evaluated and compared with baseline configuration. The acoustic and structural analyses show that the airfoil configuration mounted with two elastic panels located at the onset of sharp growth of boundary layer instabilities can significantly enhance the noise reduction potential by 52% as compared to the single panel airfoil configuration. The mutual inter-dynamical relationship among the panels strongly influence the panel vibrational behavior and their effectiveness in noise reduction.

Original languageEnglish
Title of host publicationProceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
EditorsTyler Dare, Stuart Bolton, Patricia Davies, Yutong Xue, Gordon Ebbitt
PublisherThe Institute of Noise Control Engineering of the USA, Inc.
ISBN (Electronic)9781732598652
DOIs
Publication statusPublished - Aug 2021
Event50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021 - Washington, United States
Duration: 1 Aug 20215 Aug 2021

Publication series

NameProceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering

Conference

Conference50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Country/TerritoryUnited States
CityWashington
Period1/08/215/08/21

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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