Interaction of Multiple Spark-Generated Bubbles in a Compressible Liquid
Abstract
This dissertation describes the interaction of bubbles generated by underwater electrical discharges. The oscillations of these high temperature vapor and plasma bubbles generate acoustic signatures similar to the signatures generated by air guns, underwater explosions, and combustible sources. Tasks performed by these hydrodynamic sources typically require multiple sources in an array to achieve a directional beam. The properties of a single isolated source can be used to estimate the properties of an array of multiple sources, but in many cases, the acoustic properties of the source change dramatically when several sources are placed near one another. A set of model equations was developed in this report that allowed the time evolution of the bubble generated by a spark discharge to be calculated numerically from a given discharge. A simple interaction scheme was used to couple the model equations for multiple bubbles. The coupled equations were integrated simultaneously to determine the dynamics of the elements. An apparatus containing seven individual spark discharge elements was designed and constructed to test the interaction model experimentally. The model and experimental data agreed over separations down to a few bubble diameters, and the study described when the interaction between bubbles could be neglected. Bubble dynamics, Multiple bubble interaction, Spark- generated, Vapor bubble.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1993
- Accession Number
- ADA275037
Entities
People
- Jeffrey A. Cook
Organizations
- University of Texas at Austin