冷端孔径及进口压力对涡流管性能影响的实验研究

发布时间：2018-03-29 07:46

  本文选题：涡流管　切入点：冷端孔径　出处：《低温与超导》2016年02期

【摘要】：设计了涡流管实验样机,在不同进口压力和冷流比工况下,实验测量了三种冷端孔径的涡流管性能,并分析了冷端孔径、喷嘴环端面间隙及进口压力对涡流管性能的影响。实验结果表明,冷端孔径为5mm的涡流管降温及制冷性能最佳,最佳冷端孔径与涡流管径之比为0.5。在进口压力为0.4MPa工况下,其冷端最大温降分别比冷端孔径为4mm和6mm的涡流管大6.1℃和2.9℃,最大制冷量分别大30.2%和5.4%;在所有进口压力工况下,对应于最大冷端温降的最佳冷流比约为0.5,而对应于最大制冷量的最佳冷流比约为0.65。在进口压力为0.3~0.5MPa范围内,涡流管冷端温降和制冷量均随着进口压力的升高而增大,且进口压力越高,冷端温降的增长速度越慢;制冷性能系数COP随着进口压力的升高而降低,而等熵温度效率则几乎不随进口压力改变而变化,仅是冷流比的函数。同时,实验发现,喷嘴环端面间隙对涡流管能量分离效应影响很大,设计制造过程中必须消除其影响。
[Abstract]:The experimental prototype of vortex tube is designed. The performance of three kinds of cold end aperture is measured under different inlet pressure and cold flow ratio, and the cold end aperture is analyzed. The effect of nozzle end clearance and inlet pressure on the performance of swirl tube. The experimental results show that the cooling and cooling performance of vortex tube with cold end aperture of 5mm is the best, and the optimum ratio of cold end aperture to swirl diameter is 0.5. When the inlet pressure is 0.4MPa, The maximum temperature drop at the cold end is 6.1 鈩，

本文编号：1680199