蒸气爆炸过程中压力波冲击气泡现象的数值模拟

为了进行高温金属铝液与水相互作用产生蒸气爆炸过程中压力波冲击气泡现象的机理研究,采用用Euler坐标下Level set方法追踪界面研究压力波对水下气泡的冲击过程,通过数值模拟可以清楚地看到压力波对水中气泡的冲击过程,并分别对气泡和压力波的不同初始压力条件下的作用过程进行数值模拟. 研究结果表明,气泡破裂后各观测点的最大压力随着气泡内部初始压力的增加呈线性递减;随着入射平面压力波压力载荷的降低,气泡破裂后各观测点的最大压力不断递减. 

Numerical Simulation of Shock Wave Impacting Bubble in Vapor Explosion

To study the mechanism of shock wave impacting bubble in vapor explosion caused by high-temperature molten aluminum interacting with water, the process of shock wave impacting underwater bubbles was analyzed by employing the Level set approach in Euler coordinates to track the interface and it could be clearly observed through numerical simulation. Numerical simulations of the interaction process of bubble and shock wave under different initial pressure condition were implemented. The results show that the highest pressure at where the bubble bursts decreases lineally with the increase of the interior pressure of the bubble, and that it also declines with the decrease of the pressure load of the incident plane shock wave.