Experimental study on the influence of vortex tube structure on performance—cold flow rate, length-diameter ratio, nozzle type

IF 6.9 2区工程技术 Q2 ENERGY & FUELS

Applied Thermal Engineering Pub Date : 2025-10-04 DOI:10.1016/j.applthermaleng.2025.128508

Li Wen, Qiqi Ning, Huang Li, Hao Li, Ben Zhang, Nantian Wang, Weiwei Min

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Abstract

This study conducted experimental investigations on the effects of nozzle structure, length-to-diameter ratio (L/D), and the number of nozzle flow channels on the performance of vortex tubes. The nozzle structures include the ordinary type (OT) and the convergent type (COT). Including 2, 4, and 6 flow channels. Both the convergent nozzle and the ordinary nozzle had 3 flow channels. Exploring the effects of convergent nozzles and ordinary nozzles with different L/D on the performance of vortex tubes; exploring the influence of nozzle flow channel numbers on the performance of vortex tubes at the optimal L/D of the convergent nozzle and the ordinary nozzle, and studying the effects of different L/D on the optimal flow channel numbers of the convergent nozzle and the ordinary nozzle. With the inlet pressure set at 0.4 MPa, and the cold flow rate varying between 0.5 and 0.9. The results showed that the performance of the convergent nozzle was superior to that of the ordinary nozzle. The Optimal combination was a 6-flow channel convergent nozzle and a vortex tube with an L/D of 26.7, achieving a maximum cold temperature difference of 48.6 ℃ and an isentropic efficiency of 0.49 when the cold flow rate was approximately 0.53.

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涡管结构对性能影响的实验研究——冷流量、长径比、喷嘴类型

实验研究了喷嘴结构、长径比（L/D）和喷嘴流道数对涡流管性能的影响。喷嘴结构包括普通型（OT）和会聚型（COT）。包括2、4、6个流道。收敛型喷管和普通喷管都有3个流道。探讨了不同L/D的会聚型喷嘴和普通喷嘴对涡流管性能的影响；探讨了喷嘴流道数对收敛型喷嘴和普通型喷嘴在最优L/D下涡流管性能的影响，研究了不同L/D对收敛型喷嘴和普通型喷嘴最优流道数的影响。进口压力为0.4 MPa，冷流量在0.5 ~ 0.9之间变化。结果表明，收敛型喷嘴的性能优于普通喷嘴。最优组合为6流道会聚喷嘴和L/D为26.7的涡流管，当冷流量约为0.53时，最大冷温差为48.6℃，等熵效率为0.49。

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.