轴流式喷水推进泵设计效果的考核  

Assessment of Axial Flow Jet Propulsion Pump's Design

作　　者：徐子鹏 赖焕新[1] XU Zipeng;LAI Huanxin(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《工程热物理学报》2024年第5期1366-1373,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51976061)。

摘　　要：针对一台轴流式喷水推进泵的设计方案,采用数值模拟的方法研究其内部流场,着重考察空化流动特性,分析了空泡发生的位置、压力系数、叶片载荷以及冲角等参数随空化数的变化规律。结果表明,随着来流总压的降低,空泡最初出现在吸力侧前缘附近,随后由吸力侧前缘向后缘延伸,气泡厚度以及低压区的面积也随之增大。此外,喷水推进泵水力性能的降低与叶片载荷的减小有关。本文进一步讨论了叶片数对喷水推进泵空化性能的影响,得出了四种叶片数下扬程随空化数的变化曲线,结果表明适当增加转子叶片数可以提高喷水推进泵的抗空化性能。In this paper,numerical simulation is carried out to study the internal fow field of an axial-fow water jet propulsion pump,with attentions are paid to the cavitation flow characteristics to assess the design of an axial flow jet propulsion pump.The cavitation location,disturbance velocity field,pressure coefficient,blade load,angle of attack,and their variations with cavitation number are analyzed.The results show that the cavitation firstly appears near the blade tip of the leading edge,and on the suction side.With the decrease of the cavitation number,the cavitation extends from the leading edge of the suction side to the trailing edge.The bubble thickness and the area of the low pressure zone on the suction surface also increase.Furthermore,the deterioration of the water jet propulsion pump's performance is related to the decrease of blade load.Meanwhile,the influence of blade number on cavitation characteristics is further studied.The head curves with cavitation numbers show that increasing the number of impellers properly can improve the anti-cavitation performance of the axial-fow water jet propulsion pump.

关 键 词：喷水推进泵 空化流动 数值模拟 

分 类 号：TH312[机械工程—机械制造及自动化]