| 李昊睿,艾国生,张恒瑞,王坤,赵一鸣,胡大鹏.强化热端换热对涡流管性能影响[J].,2021,61(6):601-607 |
| 强化热端换热对涡流管性能影响 |
| Effect of cooling hot tube on performance of vortex tube |
| |
| DOI：10.7511/dllgxb202106007 |
| 中文关键词: 涡流管 强制冷却 数值模拟 实验验证 |
| 英文关键词: vortex tube forced cooling numerical simulation experimental verification |
| 基金项目:国家重点研发计划资助项目(2018YFA0704602). |
|
| 摘要点击次数: 225 |
| 全文下载次数: 440 |
| 中文摘要: |
| 涡流管内部能量分离导致的外层高温流体与内层低温流体的热量交换，影响了制冷效果．为此，基于对流传热原理，设计了一种强制冷却的涡流管结构，在涡流管的热端外加冷却水腔，通入循环水对涡流管外壁进行冷却．通过实验和数值模拟的方式，研究不同结构参数和操作参数下，冷却热端外壁面对涡流管制冷性能的影响．结果表明：与传统涡流管相比，强制冷却能够削弱外层热气对回流冷气的影响，提高涡流管的制冷性能．阿基米德螺线型喷嘴较直线型喷嘴的提升更明显，最大单位制冷量达到12.53 kJ/kg．在压比为2、3和4的条件下，强制冷却涡流管的制冷性能均有提升．强制冷却涡流管的单位制冷量随热端管长径比的增加而升高，等熵效率最高可以达到34.1%． |
| 英文摘要: |
| Energy separation in the vortex tube causes heat exchange between the high temperature fluid in the outer layer and the low temperature fluid in the inner layer, which affects the refrigeration effect. Based on the principle of convective heat transfer, a forced cooling vortex tube structure was designed. A chamber of cold water was added at the hot end of the vortex tube, and the circulating water was passed through to cool the outer wall of the vortex tube. The experiments and the numerical simulation with different structural and operating parameters were carried out to study the influence of cooling the hot tube on the cooling performance of the vortex tube. The results show that compared with the traditional vortex tube, forced cooling of the vortex tube can reduce the influence of the outer heat on the return air and improve the cooling performance of the vortex tube. The improvement of Archimedean spiral nozzle is more obvious than that of straight nozzle, and the refrigerating capacity per weighing reaches 12.53 kJ/kg. Under pressure ratios of 2, 3 and 4, the cooling performances of forced cooling vortex tubes are all improved. The refrigerating capacity per weighing of the forced cooling vortex tube increases with the length diameter ratio of the hot tube increasing, and the isentropic efficiency is up to 34.1%. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|