摘要
以喷嘴形状为研究对象,分别对4流道螺旋喷嘴涡流管和直流喷嘴涡流管的流场及能量分离效应进行数值模拟分析,并将其结果进行对比。研究结果表明:配有螺旋喷嘴的涡流管能获得更大的切向速度与轴向速度;在一定范围内,涡流管冷端温差随着冷流率的增大而减小,热端温差随着冷流率的增大而增大;当冷流率为0.4时,涡流管单位制冷量与制热量都达到最大值。相比于直流喷嘴,配有螺旋喷嘴的涡流管能获得更好的能量分离效果。
Based on the nozzle shape, the numerical simulation was carried out for the flow field and energy separation effect of the helical nozzles and straight nozzles vortex tube with 4 channels. The results were compared. The research shows that a vor- tex tube with helical nozzles can achieve greater tangential and axial velocity ; In a certain range, the temperature difference at the cold end of the vortex tube decreases with the increase of the cold flow rate, and the temperature difference at the hot end increa- ses with the increase of cold rate. When the cold flow rate is 0.4, the unit cooling capacity and heating capacity of the vortex tube reach the maximum value. Compared with the straight nozzle, the vortex tube with helical nozzles can obtain energy separa- tion better.
作者
汤振豪
余晓明
丁义萍
Tang Zhenhao;Yu Xiaoming;Ding Yiping(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, Chin)
出处
《低温与超导》
CAS
北大核心
2018年第6期96-100,共5页
Cryogenics and Superconductivity
关键词
涡流管
螺旋喷嘴
直流喷嘴
数值模拟
Vortex tube
Helical nozzle
Straight nozzle
Numerical simulation
