泵喷推进器沟槽梢涡控制效果及敞水性能研究  

Tip vortex control effect and open-water performance of grooves in a pumpjet propulsor

作　　者：孙大鹏 叶金铭[1] 邹笑宇 吴原润 史宝雍 SUN Dapeng;YE Jinming;ZOU Xiaoyu;WU Yuanrun;SHI Baoyong(College of Ship and Ocean,Naval University of Engineering,Wuhan 430033,China;No.91697 Troops of PLA,Qingdao 266000,China)

机构地区：[1]海军工程大学舰船与海洋学院,湖北武汉430033 [2]91697部队,山东青岛266000

出　　处：《哈尔滨工程大学学报》2023年第4期538-545,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51579243)。

摘　　要：为控制泵喷推进器梢隙流场,抑制梢涡空化,在导管内壁开设了一定数量的沟槽结构进行研究。本文基于分离涡模拟方法并结合高质量结构化网格对泵喷推进器的梢隙流场进行了数值计算,设计并开展了基于拖曳水池的泵喷推进器敞水性能试验,对比分析了沟槽结构对梢涡形状、梢涡涡核压力和敞水性能的影响。研究表明:沟槽结构可以显著增大梢涡涡核压力,涡核相对压力时均值最少可提高36.57%,在转子尾缘后梢涡低压区域体积可以减少65.8%,能有效延迟梢涡空化,并且对泵喷推进器的水动力性能影响较小,在推进效率上还有一定的改善作用。To control the flow field of tip clearance in a pumpjet propulsor and suppress tip vortex cavitation,a certain number of grooves were set in the inner wall of the duct of a pumpjet propulsor.Based on the detached eddy simulation method and high-quality structured grid,a numerical calculation of the tip clearance flow field of the pumpjet propulsor was performed,and an open-water performance test of the pumpjet propulsor based on a towing tank was designed and performed.The effects of groove structure on the shape of the tip vortex,tip vortex core pressure,and open-water performance were compared and analyzed.The results show that the groove structure can substantially increase the core pressure of the tip vortex,the mean value of the relative pressure of the vortex core can be increased by at least 36.57%,and the volume of the low-pressure region of the tip vortex behind the rotor trailing edge can be reduced by 65.8%,which can effectively delay the tip vortex cavitation.In addition,the groove structure has little impact on the hydrodynamic performance of the pumpjet propulsor and can improve the propulsion efficiency to a certain extent.

关 键 词：泵喷推进器 梢隙流场 沟槽结构 分离涡模拟 结构网格 梢涡 空化 敞水性能 

分 类 号：U661.31[交通运输工程—船舶及航道工程]