摘要
以二氧化碳气体为工质,在入口温度为298.15 K、入口压力为6.5 MPa、冷流率为0.1时,研究了喷嘴流道数对涡流管能量分离特性的影响,并分析了涡流管内部的流动规律。模拟结果表明:喷嘴流道数为3的涡流管具有最佳制冷效应,最大制冷效应为21.86 K。涡流管内部具有内旋流与外旋流的流动特点和自由涡与强制涡的组合涡涡旋流动特点,并且存在循环流流动状态,内外旋流在交界面上以循环流形式进行热量交换。
The carbon dioxide gas was used as the working fluid. When the inlet temperature is 298.15 K,the inlet pressure is 6.5 MPa,and the cold fraction is 0.1,the influence of the nozzle flow number on the energy separation characteristics of the vortex tube and the flow law inside the vortex tube were researched. The simulation results show that the vortex tube with nozzle number of 3 has the best cooling effect,and the maximum cooling effect is 21.86 K. The inside of the vortex tube has the characteristics of the flow of the internal swirl and the outside swirl and the combined vortex of the free vortex and the forced vortex,and there is a circulating flow state. The internal and outside swirls exchange heat in the form of a circulating flow at the interface.
作者
何丽娟
马文清
孙尚志
张磊
吴夏梦
He Lijuan;Ma Wenqing;Sun Shangzhi;Zhang Lei;Wu Xiameng(Colleee of Environmeni and Energy,Inner Mongolio University of Science and Technology, Baotou 014010 ,China)
出处
《低温工程》
CAS
CSCD
北大核心
2019年第4期42-47,共6页
Cryogenics
关键词
涡流管
喷嘴流道数
三维流场
数值模拟
能量分离
vortex tube
nozzle flow path number
there-dimensional flow field
numerical simulation
energy separation
