前置与后置定子泵喷推进器的水动力性能对比  

Comparative analysis of the hydrodynamic performance of front-stator and rear-stator pump-jets

作　　者：彭云龙[1,2] 王永生 刘承江[1] 易文彬[1] PENG Yunlong;WANG Yongsheng;LIU Chengjiang;YI Wenbin(College of Marine Power Engineering,Naval University of Engineering,Wuhan 430033,China;Unit 92728,People′s Liberation Army,Shanghai 200436,China)

机构地区：[1]海军工程大学动力工程学院 [2]92728部队

出　　处：《哈尔滨工程大学学报》2019年第1期132-140,共9页Journal of Harbin Engineering University

基　　金：国家自然科学基金青年基金项目(51209212)

摘　　要：为探究前置和后置定子泵喷水动力性能上的不同,本文采用计算流体力学方法,基于物理试验数据验证的数值计算模型,从敞水性能、空化性能和脉动特性3个方面对两类泵喷的水动力性能差异进行研究。结果表明:在消耗功率相同、几何尺寸近似的前提下,后置定子泵喷推进性能、平衡性优于前置定子泵喷,在较宽进速范围其推力效率比后者高2%;前置定子泵喷抗空化性能比后置定子泵喷差,空化数越小,推力效率降低幅值越大;前置定子泵喷转子叶片引起的旋转部件流场脉动压力幅值大于后置定子泵喷,而定子、导管等静止部件的流场脉动压力与之相反,后置定子泵喷脉动压力幅值大于前置定子泵喷。To analyze the difference in hydrodynamic performance between a front-stator pump-jet and a rear-stator pump-jet,a computational fluid dynamic(CFD)method based on validated numerical simulation model which had been compared with physcial test data was used to compare the two pump-jets.Open-water performance,cavitation capability,and pressure fluctuation characteristics were compared.The results showed that under the assumptions of equal consumption power and similar geometrical size,the rear-stator pump-jet showed better propulsion and balance performance than the front-stator pump-jet.In a wider advance ratio range,the efficiency of the rear-stator was 2%higher than the front-stator jet.The cavitation capability of the front-stator pump-jet was worse than that of the rear-stator pump-jet,as the efficiency drop amplitude increased with decreasing cavitation number.The pressure fluctuation around the front-stator pump-jet rotor blades was higher than that of the rear-stator pump-jet,while,to the contrary,the pressure fluctuation caused by static components of the stator and duct was lower than that of the rear-stator pump-jet.

关 键 词：泵喷推进器 水力性能 计算流体力学 数值预报 空化 脉动特性 前置定子 后置定子 

分 类 号：U664.34[交通运输工程—船舶及航道工程]