空腔结构对文丘里管的流场特性影响  

Influence of Cavity Structure on Flow Field Characteristics of Venturi Tube

作　　者：马良 李鹏 任万龙 王苗苗 赵鑫 Ma Liang;Li Peng;Ren Wanlong;Wang Miaomiao;Zhao Xin(Qingdao Marine Science and Technology Center,Qingdao266237,Shandong,China;Institute of Oceanographic Instrumentation,Shandong Academy of Sciences,Qingdao266100,Shandong,China)

机构地区：[1]青岛海洋科技中心,山东青岛266237 [2]山东省科学院海洋仪器仪表研究所,山东青岛266100

出　　处：《工程与试验》2023年第2期27-29,42,共4页Engineering and Test

基　　金：科技部中国科学技术信息研究所ISTIC-CLARIVATE ANALYTICS科学计量学联合实验室开放基金项目“科学前沿监测及学科融合研究的创新方法和实证研究——以海洋可再生能源为例”(IT2151);国家重点研发计划课题“海洋能资源数据描述与预测”(2018YFB1501901)。

摘　　要：文丘里管流动在流速较高的情况下易产生空化。本文基于对文丘里管空化流场的研究,对文丘里管喉部结构进行结构改进,采用大涡模拟的方法进行数值分析,对有空腔结构文丘里管内流场的流动特性进行分析,分析文丘里管内压力脉动,探究不同位置的压力及速度的变化,研究空化体积分数的变化,分析不同压力比条件下,空化数及空化长度的变化。通过前面的研究与分析,掌握具有空腔结构文丘里管的流场特性,为后续文丘里管的空化应用奠定基础。Venturi tube flow is prone to cavitation at high flow rate.Based on the studies of the cavitation flow field in Venturi tube,the throat structure of Venturi tube is improved in the paper,and the large eddy simulation method is used for numerical simulation.The flow characteristics of the flow field in the Venturi tube with cavity structure are analyzed to study the pressure pulsation in Venturi tube,analyze the changes of pressure and velocity at different positions,study the changes of cavitation volume fraction,and explore the changes of cavitation number and cavitation length under different pressure ratios.Through the previous research and analysis,the flow field characteristics of Venturi tube with cavity structure are understood,which lays a foundation for cavitation application of Venturi tube.

关 键 词：文丘里管 空腔流动 空化 压力场 速度场 

分 类 号：TV132[水利工程—水力学及河流动力学]