Analysis of the Influence of Heavy Ice-breakers Multi-screw Condition on Its Open Water Performance
In view of the huge difference in resistance between the two typical working conditions of open water and ice-breaking of heavy icebreakers,it was of great significance to study how to deal with the working state of three propellers of heavy icebreaker in open water for reducing energy consumption when the design basis of propeller was icebreaking condi-tion.The three-propeller of heavy icebreaker was designed and corrected by cavitation check and correction based on the bol-lard state to simulate the icebreaking conditions.Based on different working conditions such as three propellers propulsion,middle propeller idle and side two propellers propulsion,side two propellers idle and middle propeller propulsion,the open-water navigation performance was estimated for three propellers propulsion.The comparative analysis showed that the three-propeller propulsion for the open-water navigation was more conducive to reduce the total propulsion power than that of the idle propeller propulsion,and it met the open-water design speed requirements.
heavy icebreakersthree propellers propulsionbollard thrustcavitation checkpropeller idleopen-water performance
NETL
NSTL
万方数据
