摘要
对涡流管制冷本质并进行相关的试验研究,进行理论分析,以及对四流道喷嘴涡流管的速度和温度分布进行数值模拟,结果表明:涡流管内实际流场由轴向,径向和漩涡运动组成,其流动形态在轴向上为阿基米德螺线,在横截面上为强制涡—自由涡的模型;管内流体能量的分离主要发生在涡流室区域附近,且气体从喷嘴出来后有少量直接进入冷端孔与冷气流混合,从而影响涡流管制冷效率。
Analysis of the theories aboat the vortex tube refrigeration and the flow model. And numerical simulation of velocity and temperature distributions within a vortex tube with four channels. The results show that the actual flow field within the vortex tube is composed of axial, radial and swirl movement. Flow pattern in the axial direction is as the Archimedes Spiral. The cross section is the forced - free vortex model. Separation of fluid energy in tube occurs mainly in the vicinity of the vortex chamber area. And a small amount of gas from the nozzle directly flow into cold-end mixed with the cold air. Thus affecting the rate of rerigerator of the vortex tube cold.
出处
《流体机械》
CSCD
北大核心
2013年第7期81-84,共4页
Fluid Machinery
关键词
涡流管
温度分布
流场
数值模拟
vortex tube
temperature distribution
flow field
numerical simulation
