高圧空気を駆動源とする船舶推進装置の性能向上に関する研究 : 湿り空気吹出しによる性能向上

概要

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The authors proposed the method of performance improvement by blowing moist air for a water jet ship. The authors investigated on the performance of the water jet ship by blowing air into the nozzle in former papers but there was the limit by blowing only air. In this study, the method of moist air blowing was investigated to obtain more thrust. Steam blown into the nozzle condenses just after the outlet and the average density of fluid increases. By the increase of density, the fluid in downstream can be easily accelerated by expanding bubbles of air. The experiment on this method was performed in a towing tank and the result showed that the thrust increased about 20% in comparison with the conventional method. There are many sources for supplying moist air like exhaust engines and boilers in actual ships. Our propulsion method is promising for practical use.
社団法人日本機械学会の論文
1999-03-25