Large eddy simulations of the flow field and temperature separation in the Ranque-Hilsch vortex tube

Abstract A computational fluid dynamic model is used to predict the flow fields and the associated temperature separation within a Ranque–Hilsch vortex tube. The large eddy simulation (LES) technique was employed for predicting the flow and temperature fields in the vortex tube. A vortex tube with a circumferential inlet stream and an axial (cold) outlet stream and a circumferential (hot) outlet stream was considered. The temporal evolutions of the axial, radial and azimuthal components of the velocity along with the temperature, pressure and density fields within the vortex tube are simulated. Performance curves (temperature separation versus cold outlet mass fraction) were obtained for a specific vortex tube with a given inlet mass flow rate. Simulations were carried out for varying amounts of cold outlet mass flow rates. Predictions from the present large eddy simulations compare favorably with available experimental measurements.

[1]  H. H. Bruun.  Experimental Investigation of the Energy Separation in Vortex Tubes , 1969 .

[2]  Ephraim M Sparrow,et al.  Advances in Numerical Heat Transfer , 1996 .

[3]  R HILSCH,et al.  The use of the expansion of gases in a centrifugal field as cooling process. , 1947, The Review of scientific instruments.

[4]  A. Gutsol.  The Ranque effect , 1997 .

[5]  Karl Stephan,et al.  An investigation of energy separation in a vortex tube , 1983 .

[6]  Jeffrey M. Gordon,et al.  The vortex tube as a classic thermodynamic refrigeration cycle , 2000 .

[7]  J. Smagorinsky,et al.  GENERAL CIRCULATION EXPERIMENTS WITH THE PRIMITIVE EQUATIONS , 1963 .

[8]  Gregory Nellis,et al.  Parametric and internal study of the vortex tube using a CFD model , 2005 .

[9]  R. Karunanithi,et al.  CFD analysis and experimental investigations towards optimizing the parameters of Ranque-Hilsch vortex tube , 2005 .

[10]  R Staudt,et al.  Limits of temperature separation in a vortex tube , 1994 .

[11]  de Atam Fons Waele,et al.  Experimental study on a simple Ranque–Hilsch vortex tube , 2005 .

[12]  Gregory Nellis,et al.  Comparison of CFD analysis to empirical data in a commercial vortex tube , 2006 .

[13]  B. Ahlborn,et al.  Low-pressure vortex tubes , 1996 .

[14]  W. Fröhlingsdorf,et al.  Numerical investigations of the compressible flow and the energy separation in the Ranque-Hilsch vortex tube , 1999 .

[15]  M. Kurosaka.  Acoustic streaming in swirling flow and the Ranque—Hilsch (vortex-tube) effect , 1982, Journal of Fluid Mechanics.