Turbulence-induced acoustic emission of SCUBA breathing apparatus

D. Donskoy, L. Imas, T. Yen, N. Sedunov, M. Tsionskiy, A. Sedunov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Our initial study, [1], demonstrated that the primary originating source of vibration and subsequent acoustic emission from an underwater breathing apparatus is turbulent air flow pressure fluctuations occurring during the inhale phase of breathing. The process of energy release associated with the expansion of compressed air in the high pressure scuba tank, through the first stage regulator, results in a highly turbulent, unsteady, compressible air flow. The paper presents results of experimental investigation and fluid dynamic simulation of turbulence-induced acoustic emission. The simulation reveals complex supersonic flow within the regulator's valve and channel topology. The associated regulator's air turbulent pressure pulsations and underwater acoustic emission are observed in a broadband frequency range.

Original languageEnglish
Title of host publicationNonlinear Acoustics - Fundamentals and Applications - ISNA18 - 18th International Symposium on Nonlinear Acoustics
Pages95-98
Number of pages4
DOIs
StatePublished - 2008
Event18th International Symposium on Nonlinear Acoustics, ISNA18 - Stockholm, Sweden
Duration: 7 Jul 200810 Jul 2008

Publication series

NameAIP Conference Proceedings
Volume1022
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference18th International Symposium on Nonlinear Acoustics, ISNA18
Country/TerritorySweden
CityStockholm
Period7/07/0810/07/08

Keywords

  • Air turbulence
  • SCUBA acoustic emission
  • Unterwater noise

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