Abstract
The present work is a numerical investigation of the combined axial- tangential injection effect on conical Ranque-Hilsch vortex tube performances. An orifice in the center of the conical control valve is created, allowing the injection of compressed air axially. The computational fluid dynamics CFD commercial software ANSYS CFX has been used for the present investigation, and the mean field is determined using the Reynolds-averaged Navier-Stokes equations RANS method. The main results show that the conical configuration causes a considerable drop in temperature of the cold and hot outlet flows up to 3 °C on average and a significant increase in the cold mass flow of 25% compared to the cylindrical vortex tube with axial injection.
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