Simulation Study on Hydro-static Resistance Prediction of 77.73 m Catamaran
In order to study the simple prediction method of the still water resistance of the hull,the still water resistance of a 77.73m catamaran was numerically calculated.The vis-cosity solver based on RANS was used to simulate the still water resistance and wave char-acteristics at eight speeds.The scale ratio of the actual ship and the ship model was set to 1:10 through fine meshing,and the draft of 1.30m was selected for a calculation.The na-val coefficient method was used to predict the effective power at a draft of 1.40m based on the CFD calculation results.The results show that the maximum speed of the catamaran can reach 17kn,and the total resistance is 113.67N.The naval coefficient estimates the draft of 1.40m.When the average transport speed of the actual ship is 12kn,the effective power of 1.40m draft increases from 355.88 kW to 364.kW compared with 1.30m draft.The displacement and effective power errors of the two are controlled within 4%,which meets the CFD calculation prediction standard of China Classification Society.The research results provide reliable data support and optimization suggestions for catamaran design,and have important application value for improving the accuracy of catamaran navigation resis-tance prediction results and reducing energy consumption.
77.73m catamaranstill water resistancecomputational fluid dynamics
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万方数据
