冷孔板直径对涡流管内部压力场的影响  

Dependence of Pressure Field in Vortex Tube on Cold Orifice Plate Diameter: A Simulation Study

作　　者：何丽娟[1] 陈帅帅 孙尚志 田宝云[2] 马文清 金光[1] He Lijuan;Chen Shuaishuai;Sun Shangzhi;Tian Baoyun;Ma Wenqing;Jin Guang(Inner Mongolia University of Science and Technology ,Baotou014010,China;Baotou Iron and Steel Vocational Technical College,Baotou 014010,China)

机构地区：[1]内蒙古科技大学,包头014010 [2]包头钢铁职业技术学院,包头014010

出　　处：《真空科学与技术学报》2018年第12期1093-1097,共5页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金项目(51106068和51566014);内蒙古自治区科技创新引导奖励资金项目(2017CXYD-1)

摘　　要：以理想的CO_2气体为工作流体,使用标准Standard k-ε湍流模型来模拟涡流管的能量分离效应。当涡流管冷端出口压力是2. 5 MPa、喷嘴进口压力是6. 5 MPa和喷嘴进口温度是298. 15 K、喷嘴进口压力为6. 5 MPa时,进行了涡流管内轴向、径向压力分布的模拟研究。模拟结果表明:冷流率μ为0. 1,冷孔板直径在1. 5～3. 5 mm之间变化时,轴心线上的总压分布呈现先减小后逐渐增大的趋势,各冷孔板直径在轴向距离为0 mm处的径向总压随着径向距离的增大呈逐渐增大的趋势;当径向距离在0. 5～1. 0 mm之间变化时,轴线上总压随着涡流管轴向距离的增大而增大;当径向距离为1. 5 mm时,总压随着涡流管轴向距离的增大呈先增大后减小的趋势;当径向距离在2. 0～2. 5 mm之间变化时,总压随着涡流管轴向距离的增大呈逐渐减小的趋势;当轴向距离在0～100 mm之间变化时,各轴向位置上随着径向距离增大的总压分布均呈现逐渐增大后趋于稳定的趋势。The pressure field of pure CO2 in vortex tube was mathematically formulated with Standard k-ε turbulence model,theoretically analyzed and numerically simulated with CFD software.The influence of the cold oririce-plate diameter on the pressure field was investigated.The simulated results show that the diameter has a major impact.For example,at a cold flow-rate of 0.1,as the diameter increases from 1.5 to 3.5 mm,the axial pressure profile changes in a decrease-increase mode,accompanied by an increasing radial pressure distribution at Z =0.In 0.5-1.0 mm range of R,as Z (axial-distance)increases,the axial pressure increases,but at R =1.5mm,the axial pressure changes in an increase-decrease manner with an increasing Z;in 2.0-2.5 mm range,the axial pressure decreases with an increasing Z.As Z increases from 0 to 100 mm,the radial pressure profile,at all Zs and increasing with an increasing R,changes in an increase-constant way.

关 键 词：涡流管 数值模拟 冷孔板直径 冷流率 能量分离 

分 类 号：TB619[一般工业技术—制冷工程]