涡流管性能实验研究及优化

Experimental study and optimization of vortex tube performance

设计并制作了涡流管实验样机,对喷嘴通道角度和端面间隙对涡流管冷端温降的影响进行了实验研究。结论表明:将切线型喷嘴改为收缩型后的喷嘴流道使涡流管冷端温降普遍增大。对应于进气压力为0.3MPa、0.4MPa和0.5MPa工况,冷端最大温降增幅分别为20.7%、26.6%和27.4%;喷嘴环端面间隙对涡流管冷热端温差有很大影响,喷嘴环与涡室端面间存在0.1mm的端面间隙(约为喷嘴叶道高度的6.7%),冷热端温差会下降30%。

The experimental prototype of the vortex tube was designed and manufactured, and the effect of the angle of the nozzle channel and the end face clearance on the temperature drop of the vortex tube was studied experimentally. The result shows that the tangential nozzle is changed into the contraction type nozzle flow channel, and the temperature drop of the vortex tube generally increases. Corresponding to the inlet pressures are 0.3 MPa, 0.4MPa and 0.5 MPa respectively, the maximum tempera- ture drop growths of the cold end are 20.7% , 26.6% and 27.4% respectively; the vortex tube has great influence on the temperature difference between hot and cold side nozzle ring end gap. Gap exists 0.1 mm nozzle ring and vortex chamber between the end faces （ about 6.7% of the height of the nozzle blade）. Cold end temperature difference will be decreased by 30%.