TY - GEN
T1 - Numerical study of airfoil tonal noise reduction using segmented elastic panel configuration
AU - Irsalan, Arif
AU - Lam, Garret C.Y.
AU - Leung, Randolph C.K.
N1 - Funding Information:
The authors gratefully acknowledge the support from a research donation from the Philip K. H. Wong Foundation under grant number 5-ZH1X. The first author gratefully acknowledges the support with research studentship tenable at Department of Mechanical Engineering, The Hong Kong Polytechnic University (PolyU). The second and third authors are grateful to the support from the Research Grants Council of the Government of Hong Kong Special Administrative Region under grant number A-PolyU 503/15 and the ANR/UGC International FlowMatAc number ANR-15-CE22-0016-01.
Publisher Copyright:
© INTER-NOISE 2021 .All right reserved.
PY - 2021/8
Y1 - 2021/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85117410164&partnerID=8YFLogxK
U2 - 10.3397/IN-2021-2258
DO - 10.3397/IN-2021-2258
M3 - Conference article published in proceeding or book
AN - SCOPUS:85117410164
T3 - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
SP - 2916
EP - 2929
BT - Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering
A2 - Dare, Tyler
A2 - Bolton, Stuart
A2 - Davies, Patricia
A2 - Xue, Yutong
A2 - Ebbitt, Gordon
PB - The Institute of Noise Control Engineering of the USA, Inc.
T2 - 50th International Congress and Exposition of Noise Control Engineering, INTER-NOISE 2021
Y2 - 1 August 2021 through 5 August 2021
ER -