Experimental investigation and exergy analysis of the performance of a counter flow Ranque–Hilsch vortex tube with regard to nozzle cross-section areas

2010 ◽  
Vol 33 (5) ◽  
pp. 954-962 ◽  
Author(s):  
K. Dincer ◽  
A. Avci ◽  
S. Baskaya ◽  
A. Berber
Keyword(s):  
Experimental Investigation ◽  
Cross Section ◽  
Exergy Analysis ◽  
Vortex Tube ◽  
Counter Flow ◽  
Nozzle Cross Section

CFD Study on the Effects of Nozzle Number on Turbulent Flow and Energy Separation in a Ranque-Hilsch Vortex Tube

2013 ◽  
Vol 465-466 ◽  
pp. 505-509
Author(s):  
Nilotpala Bej ◽  
Kalyan Prasad Sinhamahapatra
Keyword(s):  
Turbulent Flow ◽  
Cross Section ◽  
Vortex Tube ◽  
Internal Flow ◽  
Energy Separation ◽  
Counter Flow ◽  
Cross Section Area ◽  
Section Area ◽  
Compressible Turbulent Flow ◽  
Nozzle Cross Section

In this paper, the effects of nozzles number on the internal flow in a counter flow Ranque-Hilsch vortex tube (RHVT) are studied. A 3D structured discretized model of a counter flow multi nozzle RHVT is developed to study the dynamic behaviour of the highly swirling, compressible turbulent flow. Simulations of the turbulent flow are performed using standardk-ε model with 2, 4, 6 and 8 number of nozzles at the computational inlet. Total temperature profiles and total energy separations are studied as a function of nozzle number and total nozzle cross section area. It is observed that cooling effect increases as the nozzle number increases irrespective of total nozzle cross section area.

Experimental Study About Performance Analysis of Parallel Connected Ranque–Hilsch Counter Flow Vortex Tubes With Different Nozzle Numbers and Materials

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Hüseyin Kaya ◽  
Fahrettin Günver ◽  
Onuralp Uluer ◽  
Volkan Kırmacı
Keyword(s):  
Exergy Analysis ◽  
Vortex Tube ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Inlet Pressure ◽  
Working Fluid ◽  
Counter Flow ◽  
Heating And Cooling ◽  
Flow Vortex ◽  
Vortex Tubes

An experimental analysis for parallel connected two identical counter flow Ranque–Hilsch vortex tubes (RHVT) with different nozzle materials and numbers was conducted by using compressed air as a working fluid in this paper. Heating and cooling performance of vortex tube system (circuit) and the results of exergy analysis are researched comprehensively according to different inlet pressure, nozzle numbers, and materials. Nozzles made of polyamide plastic, aluminum, and brass were mounted into the vortex tubes individually for each case of experimental investigation with the numbers of nozzles 2, 3, 4, 5, and 6. The range of operated inlet pressure 150–550 kPa with 50 kPa variation. The ratio of length–diameter (L/D) of each vortex tube in the circuit is 14 and the cold mass fraction is 0.36. Coefficient of performance (COP) values, heating, and cooling capacity of the parallel connected RHVT system were evaluated. Further, an exergy analysis was carried out to evaluate the energy losses and second law efficiency of the vortex tube circuit. The greatest thermal performance was obtained with aluminum-six-nozzle when taking into account all parameters such as temperature difference, COP values, heating and cooling capacity, and exergy analysis.

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