Pressure and velocity fields produced by an underwater explosion

An integrated model for a moderately deep underwater explosion bubble has recently been developed. For the initial shock-wave phase, the model employs an empirical pressure-profile expression for the far field to determine bubble radius as a function of time. For the subsequent oscillation phase, the model accounts for first-order wave effects in both the external liquid and the internal gas. In the present paper, a radiation model consistent with the integrated bubble model is formulated and evaluated. The distant pressure and velocity fields produced during the shock-wave phase derive from the empirical pressure-profile expression. Those produced during the oscillation phase derive from a matched-asymptotic-expansion solution for a translating acoustic source/dipole. Response histories and snapshots for far-field pressure and velocity are computed. Comparisons with existing experimental data exhibit good correlation. (C) 2004 Acoustical Society of America.