基于CFD的自激振动空化射流喷嘴结构参数影响研究  

Parametric Study on Self-excited Vibration Cavitation Jet Nozzles based on the CFD Method

作　　者：孙鹏飞 周正权[3] 陈祎 姜哲 罗高生[2] 王彪 Sun Pengfei;Zhou Zhengquan;Chen Yi;Jiang Zhe;Luo Gaosheng;Wang Biao(College of Engineering Science&Technology,Shanghai Ocean University,Shanghai 201306,China;Shanghai Engineering Research Center of Hadal Science and Technology,Shanghai Ocean University,Shanghai 201306,China;CNOOC EnerTech Equipment Technology Co.,Tianjing 300452,China)

机构地区：[1]上海海洋大学工程学院,上海201306 [2]上海海洋大学深渊科学与技术研究中心,上海201306 [3]中海油能源发展装备技术有限公司,天津300452

出　　处：《流体机械》2019年第10期1-7,19,共8页Fluid Machinery

基　　金：国家自然科学基金重点项目(51439004);海洋工程国家重点实验室(上海交通大学)开放课题项目资助项目(1712);上海海洋大学校科技专项(A2-2006-00-200214)

摘　　要：随着海洋结构物水下清洗技术的发展,具有高效、安全、节能、环保等特点的新型空化射流清洗技术也开始新兴于水下清洗作业当中。自激振动空化射流则结合了空化射流和脉冲射流的特点,可以达到更好的空化效果,从而实现快速清洗、切割等功能。本文以传统赫姆霍兹喷嘴为研究对象,结合相关文献,在喷嘴出口处添加可以增强空化效果的扩张管结构,同时,分别以喷嘴谐振腔高度、谐振腔宽度、扩张管角度和泵额定压力为研究变量,通过计算流体动力学软件(CFD)对新型赫姆霍兹喷嘴展开数值仿真,结合仿真结果,分析不同变量对于空化射流效果的影响。本文研究成果既可以为作者今后的实验研究做好理论基础,同时,也可以为赫姆霍兹喷嘴的优化设计提供一些参考。With the development of underwater cleaning technology for Marine structures,a new cavitation jet cleaning technology with the characteristics of high efficiency,safety,environmental protection and energy saving has also begun to emerge in underwater cleaning operations.The self-excited vibration cavitation jet can be used to perform the functions of rapid cleaning and cutting which combine the characteristics of cavitation jet and pulse jet.It is important to achieve a better cavitation effect.Based on the traditional Helmholtz nozzles,this paper adds an expansion tube at the nozzle’s exit part which is used to enhance the effect of cavitation.In the meanwhile,a parametric study based on the main dimensions of the new Helmholtz nozzle such as the nozzle’s height,width,angle of expansion pipe and pump pressure has been conducted using the numerical simulation method..Critical parameters for creating a better cavitation effect have been found.The research findings can not only lay a theoretical foundation on the future experiments,but also provide some references for the design optimization of Helmholtz nozzles.

关 键 词：空化射流 自激振动 赫姆霍兹喷嘴 计算流体动力学 数值模拟 

分 类 号：TH3[机械工程—机械制造及自动化]