Interaction of Multiple Spark-Generated Bubbles in a Compressible Liquid
Interaction of Multiple Spark-Generated Bubbles in a Compressible Liquid
复制标题
DOI：
--
复制
发表时间：
1993-06
期刊：
影响因子：
--
通讯作者：
J. Cook
中科院分区：
文献类型：
--
作者：
J. Cook
摘要：本文描述了水下放电产生气泡的相互作用。这些高温蒸汽和等离子体气泡的振荡产生的声学特征类似于气枪、水下爆炸和可燃源产生的声学特征。这些水动力源执行的任务通常需要多个源阵列来实现定向波束。单个孤立声源的特性可以用来估计多个声源阵列的特性，但是在许多情况下，当几个声源彼此靠近时，声源的声学特性会发生巨大变化。本报告建立了一套模型方程，可以从给定的放电中数值计算火花放电产生的气泡的时间演变。采用一种简单的交互方案对多个气泡的模型方程进行耦合。同时对耦合方程进行积分，以确定各单元的动力学特性。设计并搭建了一个包含7个单独火花放电元件的实验装置，对相互作用模型进行了实验验证。模型和实验数据在小到几个气泡直径的分离上是一致的，并且研究描述了气泡之间的相互作用可以忽略的情况。气泡动力学，多气泡相互作用，火花产生，蒸汽气泡。
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.