冷孔板角对涡流管能量分离性能的影响  

Influence of Cold Cone Angle on Energy Separation Performance of Vortex Tube

作　　者：李冬梅[1,2] 张菁[1,2] 刘冀宁[1,2] 梁法春[3] 唐国祥[3] 曾庆港[3] LI Dongmei;ZHANG Jing;LIU Jining;LIANG Fachun;TANG Guoxiang;ZENG Qinggang(China Petroleum&Chemical Corporation Northwest Oilfield Branch,Urumqi 830011,China;SINOPEC Key Laboratory for EOR of fracture vuggy reservoir,Urumqi 830011,China;College of Pipeline and Civil Engineering in China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油化工股份有限公司西北油田分公司,乌鲁木齐830011 [2]中国石化缝洞型油藏提高采收率重点实验室,乌鲁木齐830011 [3]中国石油大学(华东)储运与建筑工程学院,青岛266580

出　　处：《真空科学与技术学报》2023年第1期66-71,共6页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金项目(52176165)。

摘　　要：为研究不同冷孔板角结构涡流管的温度分离特性,从而提高涡流管的天然气井口节流控温效果,本文选用标准k-ε湍流模型建立了以高压甲烷为工质的涡流管能量分离数值模型。结果表明:随着冷孔板角的增大,涡流管内不同轴向位置处的静温和总温先减小再有所回升;流体在涡流管中心和外侧分别呈现强制涡和自由涡的流动形式,切向速度与轴向速度在壁面附近出现峰值;制冷效应与冷孔板角度正相关,而制热效应与冷孔板角呈现负相关规律。In order to study the temperature separation characteristics of vortex tubes with different cold cone angles and improve the temperature control effect of natural gas wellhead throttling of vortex tubes,a numerical model of energy separation of vortex tubes with high pressure methane as working medium was established by using the standard k-εturbulence model.The results show that with the increase of the cold cone angle,the static temperature and total temperature at different axial positions in the vortex tube first decrease and then rise.The flow patterns of forced vortex and free vortex are observed in the center and outside of the vortex tube,respectively.The tangential velocity and axial velocity show peak values near the wall surface.The cooling effect is positively correlated with the cold cone angle,while the heating effect is negatively correlated with the cold cone angle.

关 键 词：涡流管 能量分离 冷孔板角 数值模拟 

分 类 号：TB619[一般工业技术—制冷工程]