An appropriate design of vortex-chamber geometry leads to better performance of the vortex tube. In this study, the computational fluid dynamics model created on the basis of an experimental model is a three-dimensional steady compressible model using a k - ε turbulence model to solve the equations. In this work, the parameters are focused on some geometrical parameters such as vortex-chamber radius, rounding-off edge radius, length of helical nozzle, and convergent helical nozzle intakes. Computational fluid dynamics results show that there are optimal values for the vortex chamber, rounding-off edge radii, and the convergence angle to achieve the maximum performance. In this paper, the effect of vortex-chamber radius R * and rounding-off edge radius r 1 variations on vortex tube performance have been analyzed in the ranges of 5.7 to 13 mm and r 1 = 0 4 mm , respectively. Furthermore, the effect of the length of helical nozzles and the convergence angle β of helical nozzles on the performance are studied in the range of 28 to 5 deg. The maximum Δ T c is 52.2 K for R * = 11 mm , r 1 = 1.5 mm , θ = 30 deg , and β = 15 deg at the cold mass fraction of 0.3, which is higher than the basic model around 18.9%. Finally, the results obtained, particularly the temperature values, are compared with some available experimental data, which show good agreement.


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    Title :

    Three-Dimensional Simulation of Fluid Flow and Energy Separation Inside a Vortex Tube


    Contributors:

    Published in:

    Publication date :

    2014-01-08


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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