Study on a new sterilization technology of ship ballast water using shock waves

对利用微气泡产生的反弹冲击波处理压载水的杀菌新技术进行了基础研究。当微气泡与冲击波相互作用时，理想的球形坍缩通常被证实，气泡的行为由Herring气泡运动方程估计。本文提出了一种求解两相介质中激波问题的二维数值模拟方法，得到了合理的结果。另一方面，设计并组装了一种新型的磁力辅助无阻尼激波管。使用该装置，通过弹性材料在水中产生的冲击波被证实。此外，提出了一种混合分析，估计冲击波灭菌方法的影响。

Fundamental studies have been carried out for a new sterilization technique of ballast water treatment using rebound shock waves generated by microbubbles. When a microbubble is interacted with a shock wave, ideal spherical collapse is often confirmed and the bubble behavior is estimated by Herring's bubble motion equation. A 2-dim numerical simulation scheme for solving shock problems in two-phase media has been developed and we could obtain reasonable results. In the other hand, a new diaphragmless shock tube assisted by magnetic force was designed and assembled. Using this device the shock wave generation in water through elastic materials was confirmed. In addition, a hybrid analysis that estimates the effects of a shock wave sterilization method was proposed.