High-frequency acoustic emission generated by underwater explosion with cylindrical symmetry

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Abstract

A high-frequency part of the acoustic spectrum excited by an underwater explosion with cylindrical symmetry is investigated theoretically. It is assumed that the liquid is inviscid and incompressible, the surface tension is negligible and the model for the explosive source is infinite in extent. A simple solution can be obtained when the adiabatic exponent is equal to 1.625. This, fortunately, gets into the interval of permissible heat ratio values. It is shown that, in the first approximation, the spectral density of the acoustic energy emitted by the underwater explosion with cylindrical symmetry varies as the minus 2/7 power of the frequency and decreases approximately by 2 decibels per octave. Such slow decay of the spectral density versus frequency is due to the adopted assumption about liquid incompressibility.

Original languageEnglish
Pages (from-to)687-691
Number of pages5
JournalAdvances in Fluid Mechanics
StatePublished - 1 Dec 2000
EventThird International Conference on Advances in Fluid Mechanics AFM 2000 - Montreal, Que., Canada
Duration: 24 May 200026 May 2000

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