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Citation:
　Seyed Ehsan Rafiee,M. M. Sadeghiazad.Three-Dimensional Numerical Investigation of the Separation Process in a Vortex Tube at Different Operating Conditions[J].Journal of Marine Science and Application,2016,(2):157-165.[doi:10.1007/s11804-016-1348-8]
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Three-Dimensional Numerical Investigation of the Separation Process in a Vortex Tube at Different Operating Conditions

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Title:
Three-Dimensional Numerical Investigation of the Separation Process in a Vortex Tube at Different Operating Conditions
Author(s):
Seyed Ehsan Rafiee;  M. M. Sadeghiazad
Affilations:
Author(s):
Seyed Ehsan Rafiee;  M. M. Sadeghiazad
Department of Mechanical Engineering, Urmia University of Technology, Urmia P.O. Box 57155-419, Iran
Keywords:
vortex tube; air separator; separation process; operating gas; numerical simulation
分类号:
-
DOI:
10.1007/s11804-016-1348-8
Abstract:
Air separators provide safe, clean, and appropriate air flow to engines and are widely used in vehicles with large engines such as ships and submarines. In this operational study, the separation process in a Ranque–Hilsch vortex tube cleaning (cooling) system is investigated to analyze the impact of the operating gas type on the vortex tube performance; the operating gases used are air, nitrogen, oxygen, carbon dioxide and nitrogen dioxide. The computational fluid dynamic model used is equipped with a three-dimensional structure, and the steady-state condition is applied during computations. The standard k–ε turbulence model is employed to resolve nonlinear flow equations, and various key parameters, such as hot and cold exhaust thermal drops, and power separation rates, are described numerically. The results show that nitrogen dioxide creates the greatest separation power out of all gases tested, and the numerical results are validated by good agreement with available experimental data. In addition, a comparison is made between the use of two different boundary conditions, the pressure-far-field and the pressure-outlet, when analyzing complex turbulent flows in the air separators. Results present a comprehensive and practical solution for use in future numerical studies.

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Memo

Memo:
Received date: 2015-12-03;Accepted date: 2016-01-14。
Corresponding author: Seyed Ehsan Rafiee,E-mail:s.e.rafiee@mee.uut.ac.ir
Last Update: 2016-07-06