81002405

open access

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アタラシイ センパク バラスト ミズ ショリ ギジュツ カイハツ ノ タメノ キソ ケンキュウ : スイチュウ ショウゲキハ ノ セイセイ シュウソク ジッケン ト ビショウ キホウ ウンドウ ノ スウチ カイセキ

Fundamental Study on A New Technology of Ship Ballast Water Treatment : Generation and Focusing of An Underwater Shock Wave and Numerical Analysis of Microbubble Motion

Japanese (日本語)

Review of the Faculty of Maritime Sciences, Kobe University

07<商船・理工論篇>

81-86

神戸大学大学院海事科学研究科

2010-07

2010-09-09

This paper reports the fundamental study on generation and focusing of an underwater shock wave by electric discharge in a two-dimensional ellipsoidal chamber and analytical prediction of rebound pressure of a microbubble driven by an experimental pressure profile of an incident underwater shock wave. In the experiment, the optimum condition for produce of higher pressure in the chamber is explored with optical observation of shock wave propagation by using a high-speed video camera and pressure measurement by an optical pressure transducer. It is found that the shape for a tip of electrode, the distance between electrodes and their position for arrangement are important to produce a clear cylindrical shock wave. The rebound pressure generated by collapse of a microbubble is estimated analytically by solving Herring’s bubble motion equation with experimental pressure profile of an underwater shock wave. The analytical results provide that the rebound of a microbubble can produce high pressure enough to inactivate marine bacteria.

紀要論文