Hydrodynamics of Underwater «Physical Explosion»

Gulenko Vladimir Ivanovich,Zakharchenko Evgenia Ivanovna

doi:10.34257/gjsfravol20is12pg29

Abstract

The modern scientific and technological revolution has led to profound changes in the technique and technology of marine seismic research, ensuring an increase in labor productivity, a significant increase in the volume of work, as well as an increase in their efficiency. At the same time, along with the use of floating piezoelectric seismograph, digital recording equipment, modern electronic computing equipment and more accurate satellite navigation systems, one of the important factors that contributed to improving the efficiency of seismic exploration was the introduction of a new generation of seismic signal excitation devices – non-explosive sources – into the practice of marine seismic research. Of these, the most widely used in seismic exploration in water areas around the world are pneumatic sources, in which elastic waves are excited by underwater exhaust of compressed air.

Highlights

The purpose of this work is to select and justify a theoretical model that adequately describes the process of pulsation in the water of the air cavity, as well as its acoustic radiation
A significant number of works related to the study of acoustic cavitation [1, 2, 14], the calculation of the pressure field from the explosion of condensed explosives [8, 9, 15], from electric discharges in water [10, 11], from the exhaust of compressed air into water by a pneumatic source are devoted to this issue[4, 12, 13, 16, 20]
The Rayleigh differential equation, which describes the simplest model of a pneumatic source in the form of a gas cavity, does not take into account the compressibility of water, the presence of a source, and the influence of processes occurring in it

Summary

Introduction

The purpose of this work is to select and justify a theoretical model that adequately describes the process of pulsation in the water of the air cavity, as well as its acoustic radiation. A significant number of works related to the study of acoustic cavitation [1, 2, 14], the calculation of the pressure field from the explosion of condensed explosives [8, 9, 15], from electric discharges in water [10, 11], from the exhaust of compressed air into water by a pneumatic source are devoted to this issue[4, 12, 13, 16, 20]. All of them take into account the compressibility of the liquid in different ways, and each of them leads to a certain nonlinear differential equation of motion of the cavity interface

Objectives

Results

Conclusion