定子叶片对推进器水动力性能影响分析

Influence analysis of stator blade on hydrodynamic performance of propeller

为探究定子叶片对于推进器性能影响,对不同结构的推进器进行水动力分析。设计配备加速型导流罩的7叶螺旋桨推进器,通过增加不同定子叶片以及设置对转推进器得到5种推进器。基于计算流体力学(CFD)对推进器的流场进行仿真模拟,考察不同结构推进器的水动力特性变化。结果表明:在研究的转速范围内前置定子最高降低扭矩百分比仅为48.71%,后置定子可完美平衡到100.99%的扭矩;前置定子降低推力幅度最大可达36.16%,后置定子提高整体推力最高为3.32%;对转推进器在推力方面远高于泵喷推进器2~4倍,且具有扭矩自平衡的效果,流场稳定性远低于泵喷;后置定子泵喷相比无定子推进器效率提高6.24%,且具有更加稳定的尾流场。

In order to explore the influence of stator blades on propeller performance,the hydrodynamic analysis of propellers with different structures was carried out.A seven-bladed propeller equipped with an accelerating hood is designed.Five kinds of propellers are obtained by adding different stator blades and setting counterrotating thrusters.Based on computational fluid dynamics(CFD),the hydrodynamic characteristics of propellers with different structures were investigated.The results show that the highest torque reduction percentage of the front stator is only 48.71%,and the rear stator can be perfectly balanced to 100.99%torque in the speed range studied.The thrust reduction of the front stator is up to 36.16%,and the overall thrust of the rear stator is up to 3.32%.The thrust of counterrotating thruster is 2~4 times higher than that of pump-jet thruster,and it has the effect of torque self-balance,and the flow field stability is much lower than that of pump-jet thruster.Compared with the stator-free propeller,the efficiency of the rear-mounted stator pump jet is 6.24%higher and the wake flow field is more stable.