双艉船推进因子及其实船相关分析

The propulsion factor of double-stern ship and its model-ship correlation analysis

双艉船型是目前应用于长江及内河各水系的快速性节能优秀船型。在实船航速预报、螺旋桨设计中需要较准确地估算其推进因子。本文对双艉船推进因子模型系列试验图谱进行了回归分析，给出了回归公式。并根据实船试航结果对用系列图谱计算的有效功率和推进因子进行了相关分析，表明用图谱计算结果来预估实船快速性是可靠的。

At present, double-stern form is a speedy and outstandingly energy-saving one used in Yangtze River and other waterways.For predicting real ship speed,it is necessary to estimate the propu;sopm factpr accirately.In the paper,aregression analysis on propulsion factor curves of a series of double-stern ship model tests is carried out,and a formulafor propulsion factor estimation is given.The correlation analysis on the effective power and the propulsion factor obtained from trial test results and from the estimation formaula respectively shows that the formula is relable to propulsion performance of the real double-stern ship