本文選題：渦流管　切入點：冷端孔徑　出處：《低溫與超導》2016年02期

【摘要】：設(shè)計了渦流管實驗樣機,在不同進口壓力和冷流比工況下,實驗測量了三種冷端孔徑的渦流管性能,并分析了冷端孔徑、噴嘴環(huán)端面間隙及進口壓力對渦流管性能的影響。實驗結(jié)果表明,冷端孔徑為5mm的渦流管降溫及制冷性能最佳,最佳冷端孔徑與渦流管徑之比為0.5。在進口壓力為0.4MPa工況下,其冷端最大溫降分別比冷端孔徑為4mm和6mm的渦流管大6.1℃和2.9℃,最大制冷量分別大30.2%和5.4%;在所有進口壓力工況下,對應于最大冷端溫降的最佳冷流比約為0.5,而對應于最大制冷量的最佳冷流比約為0.65。在進口壓力為0.3~0.5MPa范圍內(nèi),渦流管冷端溫降和制冷量均隨著進口壓力的升高而增大,且進口壓力越高,冷端溫降的增長速度越慢;制冷性能系數(shù)COP隨著進口壓力的升高而降低,而等熵溫度效率則幾乎不隨進口壓力改變而變化,僅是冷流比的函數(shù)。同時,實驗發(fā)現(xiàn),噴嘴環(huán)端面間隙對渦流管能量分離效應影響很大,設(shè)計制造過程中必須消除其影響。
[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，

本文編號：1680199