轮缘驱动泵喷推进器的螺旋桨性能优化方法

Propeller performance optimization method of rim-driven pump jet propulsor

为得到适用于新型轮缘驱动泵喷推进器的螺旋桨,在传统泵喷推进器螺旋桨的基础上进行性能优化方法研究十分必要。利用CFD数值模拟方法对推进器进行水动力仿真,分别对比3个不同的螺旋桨孔径比和3种桨叶厚度分布方案对推进器敞水性能的影响。对比结果发现小孔径比对推进器敞水性能更为有利,其中0.1孔径比推进器比0.3孔径比推进器的敞水效率最大提升了3.25%。厚度反置导致轮缘驱动螺旋桨高半径处压力分布不均匀,扭矩大幅提升,敞水效率大幅降低。轮缘驱动螺旋桨的厚度越小,扭矩越低,敞水效率越高,其中方案C桨的扭矩比方案A最大降低了21.74%,敞水效率最大提升了12.9%。

In order to obtain a propeller suitable for the new rim-driven pump jet propulsor,it is necessary to study the performance optimization method on the basis of the traditional pump jet propulsor.The hydrodynamic simulation of the thruster was simulated by CFD numerical simulation method,and the effects of three different propeller aperture ratios and three blade thickness distribution schemes on the open water performance of the thruster were compared.The comparison results show that the small aperture ratio is more favorable to the open water performance of the propeller,and the open water efficiency of the 0.1 aperture ratio propeller is increased by 3.25%compared to the 0.3 aperture ratio propeller.The thick-ness reversal leads to uneven pressure distribution at the high radius of the rim-driven propeller,greatly increasing torque and greatly reducing the efficiency of open water.The smaller the thickness of the rim drive propeller,the lower the torque,and the higher the open water efficiency,among which the torque of the scheme C propeller is reduced by 21.74%compared with scheme A,and the open water efficiency is increased by 12.9%.