Three-Dimensional Numerical Investigation on a Commercial Vortex Tube Based on an Experimental Model- Part I: Optimization of the Working Tube Radius

Three-Dimensional Numerical Investigation on a Commercial Vortex Tube Based on an Experimental Model- Part I: Optimization of the Working Tube Radius

Rafiee S.E. Rahimi M. Pourmahmoud N. 

Department of Mechanical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

Department of Mechanical Engineering, Urmia University of Technology, Urmia, Iran

Page: 
49-56
|
DOI: 
https://doi.org/10.18280/ijht.310107
Received: 
N/A
|
Accepted: 
N/A
|
Published: 
30 June 2013
| Citation

OPEN ACCESS

Abstract: 

The working tube is a main part of vortex tube which the process of energy separation occurs inside this part. An appropriate design of working tube geometry leads to better vortex tube efficiency. A main objective of this paper is to study the effect of working tube radius (RWT) variations on the energy separation phenomena. The computational fluid dynamics (CFD) model is created based on an experimental model and is a three-dimensional (3D) steady compressible model that utilizes the k-ε turbulence model to solve the flow equations. In this paper the effect of RWTvariations has been studied in range of RWT=4.5mm-5.7mm and the optimized radius has been determined. Another purpose of this investigation is the demonstration of the successful use of CFD in order to develop a design tool that can be utilized with confidence over a range of operating conditions and geometries. The maximum ΔTc is 46.75 K for RWT=4.9 mm at cold mass fraction α=0.3, higher than basic model around 6.8%.

Keywords: 

CFD simulation, efficiency, optimization, vortex tube, working tube

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