Sound generated by a jet-excited spherical cavity

A. W. Foley, M. S. Howe, Timothy A. Brungart

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

An analysis is made of the sound generated by the impingement of a high-speed ventilating gas jet on the gas-water interface of a ventilated supercavity. A precise analytical problem is formulated and solved in which the supercavity is modelled by a spherical cavity of equal interior volume and the jet consists of a planar, radially symmetric flow from the centre of the sphere. The gas content of the sphere is assumed to be maintained at a constant mean level by steady exhaust into the water from the 'rear end' of the cavity. It is estimated that the damping of jet-induced oscillations by this outflow is negligible compared with conventional losses produced by acoustic radiation and by viscous and thermal dissipation. The sound radiated into the water is omnidirectional at low frequencies, but with increasing frequency it progressively exhibits the directional characteristics of an acoustic dipole with axis centred on the radial axis of the gas jet.

Original languageEnglish (US)
Pages (from-to)88-99
Number of pages12
JournalJournal of Sound and Vibration
Volume315
Issue number1-2
DOIs
StatePublished - Aug 5 2008

Fingerprint

gas jets
Acoustic waves
cavities
acoustics
Gases
water
impingement
Acoustics
sound waves
gases
Water
dissipation
damping
high speed
dipoles
low frequencies
oscillations
Damping
Radiation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Foley, A. W. ; Howe, M. S. ; Brungart, Timothy A. / Sound generated by a jet-excited spherical cavity. In: Journal of Sound and Vibration. 2008 ; Vol. 315, No. 1-2. pp. 88-99.
@article{562ebabb64d64d1c8e9ab9de99b34528,
title = "Sound generated by a jet-excited spherical cavity",
abstract = "An analysis is made of the sound generated by the impingement of a high-speed ventilating gas jet on the gas-water interface of a ventilated supercavity. A precise analytical problem is formulated and solved in which the supercavity is modelled by a spherical cavity of equal interior volume and the jet consists of a planar, radially symmetric flow from the centre of the sphere. The gas content of the sphere is assumed to be maintained at a constant mean level by steady exhaust into the water from the 'rear end' of the cavity. It is estimated that the damping of jet-induced oscillations by this outflow is negligible compared with conventional losses produced by acoustic radiation and by viscous and thermal dissipation. The sound radiated into the water is omnidirectional at low frequencies, but with increasing frequency it progressively exhibits the directional characteristics of an acoustic dipole with axis centred on the radial axis of the gas jet.",
author = "Foley, {A. W.} and Howe, {M. S.} and Brungart, {Timothy A.}",
year = "2008",
month = "8",
day = "5",
doi = "10.1016/j.jsv.2008.01.039",
language = "English (US)",
volume = "315",
pages = "88--99",
journal = "Journal of Sound and Vibration",
issn = "0022-460X",
publisher = "Academic Press Inc.",
number = "1-2",

}

Sound generated by a jet-excited spherical cavity. / Foley, A. W.; Howe, M. S.; Brungart, Timothy A.

In: Journal of Sound and Vibration, Vol. 315, No. 1-2, 05.08.2008, p. 88-99.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sound generated by a jet-excited spherical cavity

AU - Foley, A. W.

AU - Howe, M. S.

AU - Brungart, Timothy A.

PY - 2008/8/5

Y1 - 2008/8/5

N2 - An analysis is made of the sound generated by the impingement of a high-speed ventilating gas jet on the gas-water interface of a ventilated supercavity. A precise analytical problem is formulated and solved in which the supercavity is modelled by a spherical cavity of equal interior volume and the jet consists of a planar, radially symmetric flow from the centre of the sphere. The gas content of the sphere is assumed to be maintained at a constant mean level by steady exhaust into the water from the 'rear end' of the cavity. It is estimated that the damping of jet-induced oscillations by this outflow is negligible compared with conventional losses produced by acoustic radiation and by viscous and thermal dissipation. The sound radiated into the water is omnidirectional at low frequencies, but with increasing frequency it progressively exhibits the directional characteristics of an acoustic dipole with axis centred on the radial axis of the gas jet.

AB - An analysis is made of the sound generated by the impingement of a high-speed ventilating gas jet on the gas-water interface of a ventilated supercavity. A precise analytical problem is formulated and solved in which the supercavity is modelled by a spherical cavity of equal interior volume and the jet consists of a planar, radially symmetric flow from the centre of the sphere. The gas content of the sphere is assumed to be maintained at a constant mean level by steady exhaust into the water from the 'rear end' of the cavity. It is estimated that the damping of jet-induced oscillations by this outflow is negligible compared with conventional losses produced by acoustic radiation and by viscous and thermal dissipation. The sound radiated into the water is omnidirectional at low frequencies, but with increasing frequency it progressively exhibits the directional characteristics of an acoustic dipole with axis centred on the radial axis of the gas jet.

UR - http://www.scopus.com/inward/record.url?scp=43049179998&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43049179998&partnerID=8YFLogxK

U2 - 10.1016/j.jsv.2008.01.039

DO - 10.1016/j.jsv.2008.01.039

M3 - Article

VL - 315

SP - 88

EP - 99

JO - Journal of Sound and Vibration

JF - Journal of Sound and Vibration

SN - 0022-460X

IS - 1-2

ER -