プロペラキャビテーションにおよぼす舵の影響について

概要

論文の詳細を見る
The effect of a rudder on propeller cavitation is studied by using a interaction theory and existing propeller theories. The rudder-induced velocity on a propeller plane is known as a potential rudder wake and its mean value is 0.04 according to ITTC report. This implies that the peak value of the potential rudder wake is high enough to affect the cavitation extent of a cavitating propeller in front of the rudder. The rudder-induced velocity on the propeller plane is calculated by the interaction theory which was developed by Nakatake. As expected, the peak values of the potential wake are about 0.1 in the case of an ordinary arrangement for a propeller and a rudder. The peak value increases with decrease of the distance between a propeller and a rudder. Also the thickness of the rudder increases the peak values. The unsteady lifting surface calculations and the cavitation extent calculations are carried out for conventional MAU propellers with a rudder. The results are summarized as follows; (1) The rudder affects the propeller cavitation considerably. (2) The cavitation extent increases with decreasing the distance between a propeller and a rudder. (3) Thickness of the rudder also increases the cavitation extent. (4) The nallower the blade width is, the larger the increment of the cavitation extent becomes.
社団法人日本船舶海洋工学会の論文
1989-03-15