Turbulent boundary layer noise in pipe flow

Seung Tae Hwang; Young J. Moon

Turbulent boundary layer noise in pipe flow

Research output: Contribution to conference › Paper › peer-review

Abstract

Turbulent boundary layer noise in pipe flow at Re_D = 5000 (or Re_τ = 175) and M = 0.1 is investigated by a LES/LPCE hybrid method. The generation and propagation of acoustic waves are computed by solving the linearized perturbed compressible equations (LPCE), with acoustic sources (DP(x, t)/Dt) attained by incompressible large eddy simulation (LES). The acoustic power spectral density is closely compared with the wall shear-stress fluctuation dipole source of the turbulent channel flow at Re_τ = 180 [Hu, Morfey, and Sandham [4]. A constant decaying rate of - 8/5 in the power spectrum is found to be related to turbulent bursts of coherent structures such as hairpin vortex and their merged structures (or hairpin packets), in particular, to their streamwise length scales that represent indeed the local rate of changes of the streamwise linear momentums.

Original language	English
Pages	3233-3241
Number of pages	9
Publication status	Published - 2016 Aug 21
Event	45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, Germany Duration: 2016 Aug 21 → 2016 Aug 24

Other

Other	45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016
Country/Territory	Germany
City	Hamburg
Period	16/8/21 → 16/8/24

Bibliographical note

Publisher Copyright:
© 2016, German Acoustical Society (DEGA). All rights reserved.

Keywords

TBL noise
Turbulent pipe flow

ASJC Scopus subject areas

Acoustics and Ultrasonics

Cite this

@conference{b02e38d249414fb0bc7afe6219085322,

title = "Turbulent boundary layer noise in pipe flow",

abstract = "Turbulent boundary layer noise in pipe flow at ReD = 5000 (or Reτ = 175) and M = 0.1 is investigated by a LES/LPCE hybrid method. The generation and propagation of acoustic waves are computed by solving the linearized perturbed compressible equations (LPCE), with acoustic sources (DP(x, t)/Dt) attained by incompressible large eddy simulation (LES). The acoustic power spectral density is closely compared with the wall shear-stress fluctuation dipole source of the turbulent channel flow at Reτ = 180 [Hu, Morfey, and Sandham [4]. A constant decaying rate of - 8/5 in the power spectrum is found to be related to turbulent bursts of coherent structures such as hairpin vortex and their merged structures (or hairpin packets), in particular, to their streamwise length scales that represent indeed the local rate of changes of the streamwise linear momentums.",

keywords = "TBL noise, Turbulent pipe flow",

author = "Hwang, {Seung Tae} and Moon, {Young J.}",

note = "Publisher Copyright: {\textcopyright} 2016, German Acoustical Society (DEGA). All rights reserved.; 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 ; Conference date: 21-08-2016 Through 24-08-2016",

year = "2016",

month = aug,

day = "21",

language = "English",

pages = "3233--3241",

}

TY - CONF

T1 - Turbulent boundary layer noise in pipe flow

AU - Hwang, Seung Tae

AU - Moon, Young J.

PY - 2016/8/21

Y1 - 2016/8/21

N2 - Turbulent boundary layer noise in pipe flow at ReD = 5000 (or Reτ = 175) and M = 0.1 is investigated by a LES/LPCE hybrid method. The generation and propagation of acoustic waves are computed by solving the linearized perturbed compressible equations (LPCE), with acoustic sources (DP(x, t)/Dt) attained by incompressible large eddy simulation (LES). The acoustic power spectral density is closely compared with the wall shear-stress fluctuation dipole source of the turbulent channel flow at Reτ = 180 [Hu, Morfey, and Sandham [4]. A constant decaying rate of - 8/5 in the power spectrum is found to be related to turbulent bursts of coherent structures such as hairpin vortex and their merged structures (or hairpin packets), in particular, to their streamwise length scales that represent indeed the local rate of changes of the streamwise linear momentums.

AB - Turbulent boundary layer noise in pipe flow at ReD = 5000 (or Reτ = 175) and M = 0.1 is investigated by a LES/LPCE hybrid method. The generation and propagation of acoustic waves are computed by solving the linearized perturbed compressible equations (LPCE), with acoustic sources (DP(x, t)/Dt) attained by incompressible large eddy simulation (LES). The acoustic power spectral density is closely compared with the wall shear-stress fluctuation dipole source of the turbulent channel flow at Reτ = 180 [Hu, Morfey, and Sandham [4]. A constant decaying rate of - 8/5 in the power spectrum is found to be related to turbulent bursts of coherent structures such as hairpin vortex and their merged structures (or hairpin packets), in particular, to their streamwise length scales that represent indeed the local rate of changes of the streamwise linear momentums.

KW - TBL noise

KW - Turbulent pipe flow

UR - http://www.scopus.com/inward/record.url?scp=84994614263&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84994614263

SP - 3233

EP - 3241

T2 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016

Y2 - 21 August 2016 through 24 August 2016

ER -

Turbulent boundary layer noise in pipe flow

Abstract

Other

Bibliographical note

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this