流体机械2024，Vol.52Issue(12)：47-56,10.DOI:10.3969/j.issn.1005-0329.2024.12.007
液氮旋转射流流场结构特性研究
Study on structure characteristics of liquid nitrogen swirling jet field
摘要
Abstract
To address the problems of reservoir damage and shaft collapse associated with conventional hydraulic jet technology,swirling abrasive liquid nitrogen jet cavitation technology was proposed as a novel waterless well completion method with focus on the flow field structural characteristics and key influencing factors of swirling abrasive liquid nitrogen jet.The results indicate that under the same conditions,the swirling abrasive liquid nitrogen jet exhibits higher velocity than that of swirling abrasive water jet.The erosion rate of the swirling abrasive liquid nitrogen jet is about 1.12 times that of the swirling abrasive water jet,with an 11.4%increase in particle-carrying velocity.When the pressure drop increases from 10 MPa to 25 MPa,the maximum liquid nitrogen flow velocity increases by 56.4%.As temperature rises from 100 K to 130 K,the maximum jet velocity increases by 5.7%.When mass flow rate increases from 0.04 kg/s to 0.10 kg/s,the erosion rate increases by 60.7%.The research results can provide theoretical basis for the liquid nitrogen jet cavitation and well completion technology in coalbed methane wells.关键词
液氮/旋转射流/流场分析/计算流体力学Key words
liquid nitrogen/swirling jet/flow field analysis/computational fluid mechanics分类
通用工业技术引用本文复制引用
李嘉文,杨睿月,黄中伟,陈健翔,秦小舟..液氮旋转射流流场结构特性研究[J].流体机械,2024,52(12):47-56,10.基金项目
国家重点研发计划项目(2021YFA0719101) （2021YFA0719101）
国家自然科学基金面上项目(52274014) （52274014）
北京市自然科学基金项目(3222039) （3222039）
