Paper presented at the 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 30 June - 2 July, 2008.
In this experimental study of the vortex tube performance
has been carried out to investigate the parameters affecting
vortex tube operation. Four cases have been studied, in which
the influences of the tube length L, the number of entrance
nozzles Nz, cold air orifice diameters dc and inlet pressure
under various condition. The effects of these parameters on the
hot and cold outlet temperature as function of cold air mass
ratio (e ) are discussed and presented. And also the coefficient
of performance (COP) of the vortex tube as a refrigerator and
as a heat pump has been calculated.
Three Dimension numerical modelling of vortex tube has
been evolved through CFD analysis by using the k– turbulence
model. Axial, radial and tangential components of the velocity
together with the temperature and pressure fields within the
vortex tube are simulated. Predictions from the present CFD
simulations were compared with data obtained from our
experiments under the same geometrical and operating
conditions.
