Dispersion of spilled oil by a cavitating jet at sea |
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Authors: | Hiroharu Kato Yuichi Oe Makoto Honoki Tetsuji Mochiki Taichi Fukazawa |
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Institution: | (1) Department of Mechanical Engineering, Faculty of Engineering, Toyo University, 2100 Kujirai, Kawagoe 350-8585, Japan |
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Abstract: | This article presents the possibility of using a high-speed water jet for the dispersion of spilled oil at sea. Laboratory
experiments showed that a high-speed water jet is very effective in dispersing heavy oil. Two methods were examined and compared
using freshwater. The first method was to disperse an oil layer on the water surface using a cavitating jet ejected upward
at an angle of 45°. A target plate was placed at the interface of the water and oil layer to enhance the collapse of cavitating
bubbles. The second method was to eject a high-speed water jet vertically downward from the air. A guide plate with a guide
hole was placed under the oil layer with no target plate as such. The second method showed an improved dispersion ability
and thus its effectiveness was examined using an oil layer on seawater. The dispersion of oil was better in seawater than
in freshwater, probably because seawater contains natural surfactants. |
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Keywords: | Dispersion Oil Cavitation Jet Spill |
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