Abstract
Flow and thermal field of a parallel flow vortex tube has been simulated and analyzed numerically. A secondary zone model is found at the core region near the inlet to the middle of the vortex tube. Blockage effect due to a narrow area of the hot exit has deflected air flow towards the cold exit, caused expansion and compression at the cold and hot outlet, respectively. The cooling and heating effect due to energy separation is contributed by expansion and compression of air near the outlet. Coeficient of performance (COP) for a refrigerator is higher as cold mass fraction increases due to a higher temperature difference and cold mass flow rate.
Highlights
Vortex or swirl flows inside a circular tube can produce an energy separation of a single stream of air into two streams at higher and lower temperatures than the single one
The cooling and heating effect due to energy separation is contributed by expansion and compression of air near the outlet
Coeficient of performance (COP) for a refrigerator is higher as cold mass fraction increases due to a higher temperature difference and cold mass flow rate
Summary
Vortex or swirl flows inside a circular tube can produce an energy separation of a single stream of air into two streams at higher and lower temperatures than the single one. Nimbalkar and Muller [4] carried out an experimental investigation to study the optimum cold end orifice for different inlet pressure and cold fractions Their results showed that the maximum value of energy separation was reached at 60% cold fraction. Xue and Arjomandi [5] investigated the effect of vortex angle on the efficiency of the Ranque-Hilsch vortex tube They found out through their experiment that the temperature difference (energy separation) was increased by giving a small vortex angle in the inlet zone of the vortex tube. The results showed that this type of nozzles causes to form higher swirl velocity in the vortex chamber than the straight one which can effectively increase amount of energy separation and cold gas temperature difference. The temperature, pressure and velocity distribution will be observed in order to study the flow behaviour and energy separation in the parallel vortex tube
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
