进气温度及冷流率对涡流管制冷性能的影响

The influence of the inlet temperature and cooling flow rate on the performance of a vortex tube

采用基于实际生产应用的涡流管模型,以空气为介质,模拟分析了不同进气温度和冷流率对涡流管制冷性能的影响,结果表明:冷流率一定时,涡流管的冷端出口温度、热端出口温度、制冷温度效应及单位制冷量均随进气温度的升高而增大,而制冷效率基本不受温度影响;在相同进气温度下,涡流管的制冷温度效应、单位制冷量及制冷效率都随冷流率的增大呈先增大后减小的趋势;存在一个最佳冷流率范围使得制冷温度效应、单位制冷量、制冷效率最大,但它们各自的最佳冷流率范围不同。

The influence of different inlet air temperature and cooling flow rates on the cooling performance of a vortex tube have been simulated using the air as the medium.The results show that when the cooling flow rate is constant,the outlet temperature at the cold end,the outlet temperature at the hot end,the cooling temperature effect and the unit cooling capacity of the vortex tube all increase with increasing inlet temperature,whilst the cooling efficiency is essentially unaffected by changes in temperature.As the cooling flow rate is increased at the same inlet temperature,the cooling temperature effect,the unit cooling capacity and the cooling efficiency of the vortex tube all initially increase and then decrease.There are optimal cooling flow rate ranges which maximize the cooling temperature effect,unit cooling capacity and cooling efficiency,but the optimal cooling flow rate range is different in each case.