The effect of vortex generator parameters (Cold orifice angle, Cold orifice diameter and Nozzle area) on
vortex tube performance is investigated experimentally. Vortex tube is connected to a natural gas
pipeline with constant pressure of 4 bars. To improve vortex tube efficiency, six generators with different
cold orifice angle, five generators with different cold orifice diameter and three generators with different
nozzle area are studied for each experiment part. Results show variation of nozzle area has no effect on
optimum cold mass fraction while cold mass angle and cold mass diameter move this point. Increment in
cold orifice diameter increases optimum cold mass fraction and decreases cold temperature. As the angle
of cold orifice increases, more mass flow passes through cold outlet and optimum cold mass fraction also
increases. The expansion of the gas in the diffuser type cold orifice is investigated as the dominating
reason for the different vortex tube performance. These mentioned designing parameters of vortex
generator affect the flow pattern and efficiency of vortex tube as a consequence. For cold orifice angle of
4.1, cold orifice ratio of 0.64 and nozzle area ratio of 0.14, highest efficiency is achieved.
The effect of vortex generator parameters (Cold orifice angle, Cold orifice diameter and Nozzle area) on
vortex tube performance is investigated experimentally. Vortex tube is connected to a natural gas
pipeline with constant pressure of 4 bars. To improve vortex tube efficiency, six generators with different
cold orifice angle, five generators with different cold orifice diameter and three generators with different
nozzle area are studied for each experiment part. Results show variation of nozzle area has no effect on
optimum cold mass fraction while cold mass angle and cold mass diameter move this point. Increment in
cold orifice diameter increases optimum cold mass fraction and decreases cold temperature. As the angle
of cold orifice increases, more mass flow passes through cold outlet and optimum cold mass fraction also
increases. The expansion of the gas in the diffuser type cold orifice is investigated as the dominating
reason for the different vortex tube performance. These mentioned designing parameters of vortex
generator affect the flow pattern and efficiency of vortex tube as a consequence. For cold orifice angle of
4.1, cold orifice ratio of 0.64 and nozzle area ratio of 0.14, highest efficiency is achieved.
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