ベックツイン舵に働く流体力に関する実験的研究

概要

論文の詳細を見る
Recent years, number of ships using VecTwin Rudder System significantly increases. The VecTwin Rudder System consists of two rudders that can rotate up to 360 degrees. It has eleven typical operation modes : Ahead, Hovering, Astern, Turn to Starboard or Port, Astern to Starboard or Port, Rotate to Starboard or Port, and Stern to Starboard or Port, These operation modes can be realized with keeping one propeller rotating direction. Although this VecTwin Rudder System is empirically known as very convenient for ship handling, rigorous explanation on usefulness of the VecTwin Rudder System has not been yet established in hydrodynamics. In this paper the author measured the hydrodynamic forces acting on the rudder at the wind tunnel of Osaka University. The drag and lift coefficients of the two rudders depend on the relative distance between the rudders, and depend on the relative distance between the propeller and the rudder stock in uniform flow and behind propeller. The experimental results are reasonably well compared with the numerical results by a vortex shedding method.
社団法人日本航海学会の論文
2000-03-25