影响内破裂因素的数值分析研究

NUMERICAL ANALYSES OF FACTORS INFLUENCING IMPLOSION

根据气－液两相流理论，引入并改进了计算流体动力学方法（ＳＩＭＰＬＥ），对压力筒内的内破裂现象进行了系统的研究，本研究发展了一套不依赖于试验结果的预报方法，较之以前的理论研究结果有了长足的进展，所采用的模型与假设能用于多种内破状况的模拟与预报。本文对多种状态的内破裂进行了数值预报，对于一系列影响内破裂的因素及降低内破裂危险性的方法进行了分析研究，分析结果对海洋水下工程实践有重要意义。

By using gas-liquid two-phase flow theory,a modified mathematical model based on the computational fluid dynamics method SIMPLE (Semi-Implicit Method for Pressure-Linked Equations)is introduced to investigate implosion phenomena in high pressure chambers systematically. A theoretical simulation-prediction method,which is independant on experimental data is developed in the paper and great improvement has been reached on the topic. In the paper,various of implosion situations have been simulated/predicted. Effects of a serial factors which influence implosion results and methods which may reduce implosion danger have been analysed. Analysis results are significant for underwater engineering practice.