涡流室半径对涡流管流场及性能影响的仿真研究  

Simulation Study of the Effect of Vortex Chamber Radius on Performance of Vortex Tubes

作　　者：韩雨泽 何丽娟[2] Han Yuze;He Lijuan(Information Science and Engineering,Guilin University of Technology,Guilin,541000,China;School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou,014010,China)

机构地区：[1]桂林理工大学信息科学与工程学院,桂林541000 [2]内蒙古科技大学能源与环境学院,包头014010

出　　处：《制冷学报》2022年第6期147-152,共6页Journal of Refrigeration

基　　金：国家自然科学基金(51566014)资助项目;内蒙古自然科学基金项目(2021MS05035)资助。

摘　　要：以理想R41气体为工质,采用Standard k-ε湍流模型,在入口压力为4.0 MPa、入口温度为323.15 K、冷流比为0.1~0.9、涡流室半径为2.5~4.5 mm时,研究涡流室半径和冷流率对涡流管性能的影响。模拟结果表明:当冷流率为0.4时,随着涡流管径向距离增大,切向速度呈先增后减趋势,当涡流室半径为3.5 mm时获得最大切向速度为159.5 m/s;随着涡流室半径增大,内外旋流轴向速度呈减小趋势,当涡流室半径为2.5 mm时获得最大外旋流轴向速度为47.6 m/s。当冷流率相同时,随着涡流室半径的增大,涡流管制冷效应、制热效应、制冷量及COP均呈先增后减的趋势,当冷流率为0.1,涡流室半径为3.5 mm时获得最大制冷效应为20.8 K;当冷流率为0.9,涡流室半径为3.0 mm时获得最大制热效应为36.3 K;当冷流率为0.6,涡流室半径为3.0 mm时获得最大制冷量为364.5 W,COP最大值为0.21。The effects of the vortex chamber radius and cold flow ratio on the performance of a vortex tube are studied using R41 gas as the working medium.The standard k-εturbulence model is adopted,where the inlet pressure and temperature were set as 4.0 MPa and 323.15 K,respectively.The cold flow ratio ranges from 0.1 to 0.9,and the vortex chamber radius ranges from 2.5 mm to 4.5 mm.At a cold flow ratio of 0.4,the tangential velocity first increased and then decreased with the increase in the radial distance of the vortex tube.When the vortex chamber radius was 3.5 mm,the maximum tangential velocity was 159.5 m/s.As the vortex chamber radius increased,the axial velocity of the internal and external swirls decreased.When the vortex chamber radius was 2.5 mm,the maximum axial velocity of the external swirl was 47.6 m/s.The maximum cooling effect was achieved at a flow rate and vortex chamber radius of 1.5 mm and 0.5 mm,respectively.At a cooling flow ratio of 0.9 and vortex chamber radius of 3.0 mm,the maximum heating effect was 36.3 K.At a cooling flow ratio of 0.6 and vortex chamber radius of 3.0 mm,the maximum cooling capacity and COP were 364.5 W and 0.21,respectively.

关 键 词：涡流管 涡流室半径 涡流管性能 流场 冷流率 

分 类 号：TB611[一般工业技术—制冷工程] TB657.5