Turbulent boundary layer noise in pipe flow

Seung Tae Hwang, Young June Moon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish
Title of host publicationProceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future
PublisherGerman Acoustical Society (DEGA)
Pages3233-3241
Number of pages9
Publication statusPublished - 2016 Aug 21
Event45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016 - Hamburg, Germany
Duration: 2016 Aug 212016 Aug 24

Other

Other45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016
CountryGermany
CityHamburg
Period16/8/2116/8/24

    Fingerprint

Keywords

  • TBL noise
  • Turbulent pipe flow

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Hwang, S. T., & Moon, Y. J. (2016). Turbulent boundary layer noise in pipe flow. In Proceedings of the INTER-NOISE 2016 - 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future (pp. 3233-3241). German Acoustical Society (DEGA).