期刊名称：International Journal of Advances in Engineering and Management
电子版ISSN：2395-5252
出版年度：2020
卷号：2
期号：5
页码：705-711
DOI：10.35629/5252-0205647653
语种：English
出版社：IJAEM JOURNAL
摘要：The vortex tube (VT) is a mechanical device that can simultaneously provide hot gas & cold air at extreme ends of the tube using compressed gas supplied at high pressure. In this work, a 3D CFD model is first developed to simulate the flow of CO2 within a vortex tube, and then it is validated with published experimental data. The assumed k-ε turbulence model uses Tetra hedron elements generated in ANSYS Meshing. The validated CFD model is combined with a thermodynamic model of the VT to complete a parametric study, where the inlet pressure (550kPa to 1300kPa) and cold mass fraction (0.2 to 0.9) are the chosen parameters. The effects on the VT energy separation and performance are presented. Energy separation is discussed in terms of the hot exit and cold exit temperature differences, both with respect to the VT inlet temperature. Performance is characterized by cooling power, heating power, and both energy and exergy metrics. The numerical results show that the variation of the cold mass fraction from 0.2 to 0.9, for a fixed inlet pressure of 1300 kPa, causes the hot exit temperature difference to rise from 10 ˚C to 78.9 ˚C, while the cold exit temperature difference falls from 44.56˚C to 17.15˚C.
