The vortex tube (VT) air separator is an invaluable tool which has the ability to separate a high-pressure fluid into the cold and hot fluid streams. The hot tube is a main part of the air separator VT which the energy separation procedure happens along this part. This research has been done to analyze the effect of the convergent angle and cold orifice diameter on the thermal efficiency of a convergent vortex tube (CVT). The CVT is linked to an air pipeline with the fixed pressure of 6.5 bar. The convergent hot tube angle is varied over the range of 1 deg to 9 deg. The consideration of the main angle effect denotes that the highest thermal ability could be achieved at β = 5 deg. The laboratory setup results show this subject that the optimization of the hot tube convergent angle elevates the cooling and heating effectiveness around 32.03% and 26.21%, respectively. Experiments denoted that both cooling capability and heating effectiveness reach the highest magnitudes when the DCold is around 9 mm. After these two stages, the optimized CVT was capable of decreasing and rising air temperatures at the cold and the hot sides up to 9.05 K (42.89%) and 10.48 K (44.74%), respectively. A computational fluid dynamics (CFD) model was employed to predict the performance of the air flow inside the CVT. The numerical investigation was done by full 3D steady-state CFD-simulation using fluent6.3.26. The results show that the agreement between computation predictions and laboratory measurements is fairly good.
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December 2015
Research-Article
Experimental and Numerical Investigation on Effect of Convergent Angle and Cold Orifice Diameter on Thermal Performance of Convergent Vortex Tube
Seyed Ehsan Rafiee,
Seyed Ehsan Rafiee
Department of Mechanical Engineering,
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: s.e.rafiee@mee.uut.ac.ir
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: s.e.rafiee@mee.uut.ac.ir
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M. M. Sadeghiazad,
M. M. Sadeghiazad
Department of Mechanical Engineering,
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: rez.saeed@yahoo.com
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: rez.saeed@yahoo.com
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Nasser Mostafavinia
Nasser Mostafavinia
Young Researchers and Elite Club,
Mahabad Branch,
Islamic Azad University,
Mahabad 59139-33137, Iran e-mail: n.geramian@mee.uut.ac.ir
Mahabad Branch,
Islamic Azad University,
Mahabad 59139-33137, Iran e-mail: n.geramian@mee.uut.ac.ir
Search for other works by this author on:
Seyed Ehsan Rafiee
Department of Mechanical Engineering,
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: s.e.rafiee@mee.uut.ac.ir
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: s.e.rafiee@mee.uut.ac.ir
M. M. Sadeghiazad
Department of Mechanical Engineering,
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: rez.saeed@yahoo.com
Urmia University of Technology,
Urmia 57166-17165, Iran e-mail: rez.saeed@yahoo.com
Nasser Mostafavinia
Young Researchers and Elite Club,
Mahabad Branch,
Islamic Azad University,
Mahabad 59139-33137, Iran e-mail: n.geramian@mee.uut.ac.ir
Mahabad Branch,
Islamic Azad University,
Mahabad 59139-33137, Iran e-mail: n.geramian@mee.uut.ac.ir
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received September 15, 2014; final manuscript received March 10, 2015; published online June 16, 2015. Assoc. Editor: Mehmet Arik.
J. Thermal Sci. Eng. Appl. Dec 2015, 7(4): 041006 (13 pages)
Published Online: June 16, 2015
Article history
Received:
September 15, 2014
Revision Received:
March 10, 2015
Citation
Rafiee, S. E., Sadeghiazad, M. M., and Mostafavinia, N. (June 16, 2015). "Experimental and Numerical Investigation on Effect of Convergent Angle and Cold Orifice Diameter on Thermal Performance of Convergent Vortex Tube." ASME. J. Thermal Sci. Eng. Appl. December 2015; 7(4): 041006. https://doi.org/10.1115/1.4030639
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