艇体/导管螺旋桨干扰特性尺度效应数值模拟研究

Numerical simulation of the scale effect of hull/ducted propeller interaction

尺度效应是船舶性能预报过程中不可忽略的重要因素,对于非常规推进器推进水下航行体其影响更加复杂。文章采用数值模拟方法研究不同尺度下导管螺旋桨与艇体之间的相互干扰,分析尺度效应对推进器艇后推进性能的影响。计算了三个不同尺度自航模型中推进器的艇后作用曲线以及自航点处的推进性能,研究了尺度效应的影响;对自航模型中螺旋桨尺度效应的成分进行分析,得出了螺旋桨尺度效应的主要来源。

Scale effect issue affects all aspects of ship hydrodynamic performance at various levels. It gets even more complex when coping with new propulsors and ship types. In this paper, three different scale self-propulsion models were simulated to figure out the scale effect of hull/ducted propeller interaction. By cal-culating the powering performance of the ducted propeller in the behind condition, the self-propulsion points of the three different scale models were figured out. And, the scale effect of the self-propulsion factors and how the scale effect affects the powering performance were studied. Finally, the propeller was analyzed spe-cially to find out the components of its scale effect.