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

A high-frequency parr of the acoustic spectrum excited by an underwater exp losion with cylindrical symmetry is investigated theoretically. It is assum ed that the liquid is inviscid, the surface tension is negligible, curd the model for the explosive source is infinite in extent. A simple solution ca n be obtained when the adiabatic exponent is equal to 1.625. This, fortunat ely, gets into the interval of permissible heat ratio values. It is shown t hat, in the first approximation, the spectral density of the acoustic energ y emitted by the underwater explosion with cylindrical symmetry varies as t he minus 4/3 power of the frequency and decreases approxoimately by 4 decib els per octave.