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Computational analysis of energy separation in a counter-flow vortex tube based on inlet shape and aspect ratio

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  • Manimaran, R.

Abstract

This article describes the energy separation with the simulation of a three dimensional flow field in Ranque-Hilsch vortex tube. Rectangular and trapezoidal shaped inlets with varying aspect ratio are compared and analyzed while other geometrical parameters are held constant. Air is used as a working fluid. The nature of flow field inside the vortex tube is observed for different cases at an inlet pressure condition of 6 bar (absolute). From the results, it is observed that inlet with higher aspect ratio gives higher temperature separation. The trapezoidal inlet configuration is found to give higher temperature separation as compared to a rectangular shape. The streamlines emanating at the hot and cold end exits for both the rectangular and trapezoidal are visualized. Residence time for two shapes is calculated and found to be higher for trapezoidal shape. The increase in turbulence kinetic energy for the cold end exiting streamlines at the dividing region between core and periphery could be an important factor towards energy separation.

Suggested Citation

  • Manimaran, R., 2016. "Computational analysis of energy separation in a counter-flow vortex tube based on inlet shape and aspect ratio," Energy, Elsevier, vol. 107(C), pages 17-28.
    • Handle: RePEc:eee:energy:v:107:y:2016:i:c:p:17-28
    DOI: 10.1016/j.energy.2016.04.005
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    References listed on IDEAS

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    1. Im, S.Y. & Yu, S.S., 2012. "Effects of geometric parameters on the separated air flow temperature of a vortex tube for design optimization," Energy, Elsevier, vol. 37(1), pages 154-160.
    2. Thakare, Hitesh R. & Parekh, A.D., 2015. "Computational analysis of energy separation in counter—flow vortex tube," Energy, Elsevier, vol. 85(C), pages 62-77.
    3. Aydın, Orhan & Baki, Muzaffer, 2006. "An experimental study on the design parameters of a counterflow vortex tube," Energy, Elsevier, vol. 31(14), pages 2763-2772.
    4. Rafiee, Seyed Ehsan & Rahimi, Masoud, 2013. "Experimental study and three-dimensional (3D) computational fluid dynamics (CFD) analysis on the effect of the convergence ratio, pressure inlet and number of nozzle intake on vortex tube performance–," Energy, Elsevier, vol. 63(C), pages 195-204.
    5. Kandil, Hamdy A. & Abdelghany, Seif T., 2015. "Computational investigation of different effects on the performance of the Ranque–Hilsch vortex tube," Energy, Elsevier, vol. 84(C), pages 207-218.
    6. Farzaneh-Gord, Mahmood & Sadi, Meisam, 2014. "Improving vortex tube performance based on vortex generator design," Energy, Elsevier, vol. 72(C), pages 492-500.
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    Cited by:

    1. Ambedkar, P. & Dutta, T., 2023. "CFD simulation and thermodynamic analysis of energy separation in vortex tube using different inert gases at different inlet pressures and cold mass fractions," Energy, Elsevier, vol. 263(PB).
    2. Yefeng Liu & Ying Sun & Danping Tang, 2019. "Analysis of a CO 2 Transcritical Refrigeration Cycle with a Vortex Tube Expansion," Sustainability, MDPI, vol. 11(7), pages 1-14, April.
    3. Manimaran, R., 2017. "Computational analysis of flow features and energy separation in a counter-flow vortex tube based on number of inlets," Energy, Elsevier, vol. 123(C), pages 564-578.

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