逆流型涡流管流动与传热特性模拟研究
Flow and Heat Transfer Simulation of a Counter-Flow Vortex Tube
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- 引用格式:
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郭艳林,周俊龙,汪怡佳,梁法春,曹学文,陈俊文.逆流型涡流管流动与传热特性模拟研究[J].天然气与石油,2020,38(3):1-6.doi:
Guo Yanlin, Liang Fachun, Cao Xuewen, Chen Junwen.Flow and Heat Transfer Simulation of a Counter-Flow Vortex Tube [J].Natural Gas and Oil,2020,38(3):1-6.doi:
- DOI:
- 作者:
- 郭艳林1 周俊龙2 汪怡佳3 梁法春4 曹学文4 陈俊文1
Guo Yanlin1, Liang Fachun2, Cao Xuewen2, Chen Junwen1
- 作者单位:
- 1. 中国石油工程建设有限公司西南分公司,2. 中国石油天然气股份有限公司塔里木油田公司,3. 重庆页岩气勘探开发有限责任公司，4. 中国石油大学(华东)储运与建筑工程学院
China Petroleum Engineering ＆ Construction Corp. Southwest Company，Chengdu，Sichuan，610041，China; 2. College of Pipeline and Civil Engineering．China University of Petroleum， Qingdao，Shandong，266580，China
- 关键词:
- 涡流管;数值模拟;能量分离;水合物控制
Vortex tube; Numerical simulation; Energy separation; Hydrate control
- 摘要:
涡流管能量分离机理较复杂,采用计算流体力学(CFD)模拟分析可实现较直观的流场与能量跟踪，为此应用Realizable k-ε模型对四流道涡流管进行天然气节流三维数值模拟。结果表明:涡流管中心为内旋流,从热端流向冷端出口,轴向速度为正值;靠近管壁为外旋流,从入口流向热端管出口,轴向速度为负值,内外旋流之间为轴向零速度面。在二次流作用下,涡流管内出现显著的能量分离。由于存在制热效应,与节流阀相比,相同压降下涡流管温降幅度更小,在天然气集输站场上有望采用涡流管代替节流阀,以简化工艺流程。
Vortex tube can replace choke vale to reduce well head pressure without heating and chemical injection.However, due to the complexity of energy separation mechanism,the reliable prediction model is still a challenge.The Realizable turbulence model was used to simulate the velocity and temperature distribution of the vortex tube with four inlet channels.The numerical results demonstrated that there exist two part of swirling flow inside the vortex tube:the inner flow with positive axial velocity and the outer flow with negative velocityand a zero-velocity profile is located between them.Significant energy separation is observed due to the effect of secondary flow.Compared with throttle valve, the temperature drop is much lower due to heating effect of the vortex tube. It can be used in gas station to replace throttle valve for hydrate control.
