热端管长度对涡流管性能影响的实验研究

研制了不同热端管长度的涡流管,并以空气作为工作介质,通过实验研究了热端管长度对涡流管能量分离性能的影响.实验结果表明:对于常温涡流管,在入口压力为0.5MPa的情况下,相同冷流率时,随着热端管长度的增加,涡流管的制冷温度效应、单位制冷量和制冷系数增加,而其制热温度效应无显著的规律;对同一热端管长的涡流管,随着冷流率的增加,涡流管的制冷温度效应、单位制冷量和制冷系数增加,且在冷流率为40%～50%时出现峰值,而制热温度效应随冷流率的增加而增加,在冷流率范围内未出现峰值.

Experimental Study on the Length of Vortex Hot Tube Effect on the Performance of Vortex Tube

Vortex tubes of different length were developed and the effect of the length on the performance of vortex tube was investigated by experiment with air as medium. The experiment results show that the temperature difference between inlet and cold air outlet, the unit refrigeration and the coefficient of performance increases with the increase of the length of vortex tube under the same cold fraction with ambient temperature and inlet pressure of 0.5MPa, while the temperature difference between the hot air outlet and inlet didn't have remarkable rule. As to single vortex tube, the temperature difference between inlet and cold air outlet, the unit refrigeration and the coefficient of performance increased with the increase of the cold fraction, then reaches top when the cold fraction was 40%-50%. And the temperature difference between the hot air outlet and inlet is increasing in the cold fraction span range under the same experimental condition.