脉冲对空化射流影响机理研究  

Influence Mechanism of Pulse on the Cavitation Jet

作　　者：周传喜[1] 陈伟华 潘忠义 管锋[1] 刘先明 万锋[1] Zhou Chuanxi;Chen Weihua;Pan Zhongyi;Guan Feng;Liu Xianming;Wan Feng(School of Mechanical Engineering,Yangtze University;ShengLi oil Field DeLi Industrial Co.,Ltd.)

机构地区：[1]长江大学机械工程学院 [2]胜利油田德利实业有限责任公司

出　　处：《石油机械》2022年第11期30-36,42,共8页China Petroleum Machinery

基　　金：国家采油装备工程技术研究中心创新基金项目“空化射流解堵理论及工具设计研究”(ZBKJ2022-A-01);湖北省教育厅科学研究计划资助项目“不同钻井工况下溢流识别算法及自动化关井机理研究”(D20201305);湖北省高价值知识产权培育工程项目“复杂油气井井筒干预与解堵设备研制及应用研究”(D2021001933)。

摘　　要：由于脉冲对空化效果的作用机理尚不清晰、相关研究鲜有涉及,利用Visual Studio软件对Workbench Fluent进行二次开发,建立了空化喷嘴有限元计算模型,开展了不同脉冲射流类型、幅值和周期下的空化特性研究,揭示了脉冲射流对空化效果的影响规律。研究结果表明:脉冲射流对空化的形成具有较大促进作用,在出口淹没区域形成了第2次空化现象;不同脉冲类型形成的空化效果有明显的区别,适用于不同的工况;脉冲幅值越大,空化作用越强;脉冲周期对第1次空化影响较小,对二次空化影响较大,其中对低幅值脉冲二次空化作用影响较小,对高幅值脉冲二次空化作用影响较大,即随着脉冲周期的增长,高幅值脉冲二次空化作用显著减弱。研究结果可为指导空化射流类工具的设计以及工程应用中流体参数控制提供理论依据。The mechanism of the effect of pulse on the cavitation is not clear, and there are few related researches presently.In this paper, Visual Studio software was used for secondary development of Workbench Fluent, the finite element calculation model of cavitation nozzle was established, cavitation characteristics of different pulse jet types, amplitudes and periods were studied, and the influence law of pulsed jet on cavitation effect was revealed.The results show that the pulsed jet can greatly promote the formation of cavitation, and the second cavitation phenomenon was formed in the flooded area of the outlet.The cavitation effect formed by different pulse types is obviously different, which is suitable for different working conditions.The larger the pulse amplitude, the stronger the cavitation effect.Pulse period has a small effect on the first cavitation, but a great effect on the second cavitation.For the second cavitation of low-amplitude pulse, pulse period has a small effect;while for the second cavitation of high-amplitude pulse, pulse period has a great effect.That is, with the increase of the pulse period, the second cavitation of the high-amplitude pulse is weakened significantly.The results provide a theoretical basis for the design of cavitation jet tools and the control of fluid parameters in engineering applications.

关 键 词：脉冲射流 二次空化 参数影响 空化射流 

分 类 号：TE21[石油与天然气工程—油气井工程]