船首船底の斜航流場調査

概要

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In order to make a basic design concept of electro-magnetic log arrangement on high-speed ship, flow field around fore bottom is investigated experimentally and numerically. To clarify the characteristics of fore bottom flow field at incidence, measurement of velocity distributions by use of 3-hole pitot tube and flow visualization are carried out. Velocity distributions in real ship at both ahead and steady turning conditions are also measured by changing log depth. It is pointed out that boundary layer thickness at ahead, longitudinal vorticies caused by separation of flow and deformation of boundary layer at incidence should be taken into consideration for log arrangement. The comparison between the calculated boundary layer parameters by Okuno's method on 3-D turbulent boundary layer and the measured one shows good agreement even on high-speed slender ship.
社団法人日本船舶海洋工学会の論文
1989-03-25