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新型杀菌技术进行了基础性研究。当微气泡与激波相互作用时，通常会确认理想的球形坍塌，并用Herring的气泡运动方程来估计气泡的行为。发展了一种求解两相介质中激波问题的二维数值模拟格式，得到了合理的结果。另一方面，设计并组装了一种新型磁力辅助无隔膜激波管。利用该装置证实了水中冲击波在弹性材料中的产生。此外，还提出了一种评估冲击波灭菌方法效果的混合分析。

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.