Abstract
In this paper, a numerical investigation is carried out to realize the behavior of a fabricated vortex tube. A computational fluid dynamics model is used to simulate the flow field structure in the tube in order to study the effects of various parameters on the performance and temperature separation. Numerical results such as temperature separation versus cold outlet mass fraction are obtained for a specific vortex tube with given inlet thermo physical properties. The numerical results are obtained for various amounts of cold outlet mass fractions. The calculated temperature distributions inside the Ranque-Hilsch Vortex Tube (RHVT) are simultaneously compared with available experimental results and a good agreement between them is noticed. It is found that increasing the inlet nozzle height improves the performance of the RHVT. The results also indicated that small values of cold mass fraction give best result in cold exit temperature difference.
Highlights
Azimuthally at one end and produces a strong vortex flow in the tube
It has been used to simulate the flow patterns and temperature separation phenomenon in a Ranque-Hilsch vortex tube (RHVT), which has two convergent circumferential nozzles. Numerical results such as temperature separation versus cold outlet mass fraction are obtained for a specific vortex tube with given inlet thermo physical properties
Simulations were conducted for different tube lengths, nozzle heights and cold mass fractions by changing the hot exit area
Summary
Azimuthally at one end and produces a strong vortex flow in the tube. the gas expands through the nozzle and achieves a high angular velocity, causing a vortextype flow in the tube. The results indicated that the temperature difference between hot and cold gas flow can be improved by increasing the length of vortex tube such that stagnation point is located far from the nozzle inlet and within the tube They conducted another research work to study the effect of helical nozzles on both energy separation and refrigeration phenomena in the RanqueHilsch Vortex Tube by CFD techniques. It has been used to simulate the flow patterns and temperature separation phenomenon in a Ranque-Hilsch vortex tube (RHVT), which has two convergent circumferential nozzles Numerical results such as temperature separation versus cold outlet mass fraction are obtained for a specific vortex tube with given inlet thermo physical properties. Both numerical and experimental results are obtained for various amounts of cold outlet mass fractions
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