单桨船螺旋桨安装位置确定

Determination of propeller position in aperture for mono-hull ships

通过船模螺旋桨在3个不同安装位置的自航试验,探讨了螺旋桨位置对推进效率的影响.试验结果表明,选择合适的螺旋桨位置,有利于提高舵的整流作用,改善船后伴流分布,减小推力减额,从而提高推进效率,达到船舶节能的目的.作为一个典型试验的结果,在0.1D(D为螺旋桨直径)范围内移动螺旋桨,在航速上可获得3%～5%的增量.因此,在船舶设计中有必要重视螺旋桨安装位置的选择.

A series of self-propulsive tests for mono-hull ship models are carried out to investigate the effect of different propeller positions in aperture on propulsive efficiency. It is shown that an appropriate position for propeller in aperture is profitable in order to regenerate the energy expensed by overcoming hull resistance. This typical test result has proved that to shift the position for propeller with range of 0.1 D (D is the propeller diameter) in aperture may obtain increment of 3%-5% in ship speed. That means the attention should be paid to the determination of propeller position in ship design practice.