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Type: Journal article
Title: Experimental study of the thermal separation in a vortex tube
Author: Xue, Y.
Arjomandi, M.
Kelso, R.
Citation: Experimental Thermal and Fluid Science, 2013; 46:175-182
Publisher: Elsevier Science Inc
Issue Date: 2013
ISSN: 0894-1777
Statement of
Yunpeng Xue, Maziar Arjomandi and Richard Kelso
Abstract: A vortex tube, a simple mechanical device capable of generating separated cold and hot fluid streams from a single injection, has been used in many applications, such as heating, cooling, and mixture separation. To explain its working principle, both experimental and numerical investigations have been undertaken and several explanations for the temperature separation in have been proposed. However, due to the complexity of the physical process in the vortex tube, these explanations do not agree with each other well and there has not been a consensus.This paper presents an experimental study of the flow properties in a vortex tube focusing on the thermal separation and energy transfer inside the tube. A better understanding of the flow structure inside the tube was achieved, based on the observed three-dimensional velocity, turbulence intensity, temperature and pressure distributions. The gradual transformation of a forced vortex near the inlet to a free vortex at the hot end is reported in this work. The calculated exergy distribution inside the vortex tube indicates that kinetic energy transformation outwards from the central flow contributes to the temperature separation. Experimental results found in this research show a direct relationship between the formation of hot and cold streams and the vortex transformation along the tube. © 2012 Elsevier Inc.
Keywords: Ranque effect
Ranque-Hilsch vortex tube
Forced and free vortex
Thermal separation
Vortex flow
Rights: © 2012 Elsevier Inc. All rights reserved.
DOI: 10.1016/j.expthermflusci.2012.12.009
Appears in Collections:Aurora harvest
Mechanical Engineering publications

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