scholarly journals A PARAMETRIC STUDY OF CONICAL FRUSTUM GEOMETRY FOR IMPROVEMENT OF COOLING PERFORMANCE OF VORTEX TUBE

2015 ◽  
Vol 20 (4) ◽  
pp. 7-13
Author(s):  
H.B. Koo ◽  
J.Y. Park ◽  
D.Y. Sohn ◽  
Y.H. Choi
Keyword(s):  
Parametric Study ◽  
Vortex Tube ◽  
Cooling Performance

A parametric study on the performance of a Ranque-Hilsch vortex tube using a CFD-based approach

2015 ◽  
Vol 16 (2) ◽  
pp. 203
Author(s):  
Nader Pourmahmoud ◽  
Ashkan Feyzi ◽  
Ali Atashbar Orang ◽  
Amin Paykani
Keyword(s):  
Parametric Study ◽  
Vortex Tube

scholarly journals Modeling the cooling performance of vortex tube using a genetic algorithm-based artificial neural network

2016 ◽  
Vol 20 (1) ◽  
pp. 53-65 ◽  
Author(s):  
Hassan Pouraria ◽  
Seyed Kia ◽  
Warn-Gyu Park ◽  
Bahman Mehdizadeh
Keyword(s):  
Neural Network ◽  
Experimental Data ◽  
Genetic Algorithm ◽  
Artificial Neural Network ◽  
Network Model ◽  
Neural Network Model ◽  
Vortex Tube ◽  
Temperature Drop ◽  
Cooling Performance ◽  
Artificial Neural

In this study, artificial neural networks (ANNs) have been used to model the effects of four important parameters consist of the ratio of the length to diameter(L/D), the ratio of the cold outlet diameter to the tube diameter(d/D), inlet pressure(P), and cold mass fraction (Y) on the cooling performance of counter flow vortex tube. In this approach, experimental data have been used to train and validate the neural network model with MATLAB software. Also, genetic algorithm (GA) has been used to find the optimal network architecture. In this model, temperature drop at the cold outlet has been considered as the cooling performance of the vortex tube. Based on experimental data, cooling performance of the vortex tube has been predicted by four inlet parameters (L/D, d/D, P, Y). The results of this study indicate that the genetic algorithm-based artificial neural network model is capable of predicting the cooling performance of vortex tube in a wide operating range and with satisfactory precision.

scholarly journals Numerical investigation on cooling performance of Ranque-Hilsch vortex tube

2014 ◽  
Vol 18 (4) ◽  
pp. 1173-1189 ◽  
Author(s):  
Hassan Pouraria ◽  
Warn-Gyu Park
Keyword(s):  
Vortex Tube ◽  
Cooling System ◽  
Flow Behavior ◽  
Temperature Drop ◽  
Turbulence Models ◽  
Peripheral Region ◽  
Energy Separation ◽  
Net Energy ◽  
Cooling Performance ◽  
Refrigeration Capacity

A Ranque-Hilsch vortex tube (RHVT) is a mechanical device that separates a high pressure gas stream into low pressure hot and cold streams. In this study, four different two equation turbulence models namely the standard k-?, RNG k-?, Realizable k-? and standard k-? models were compared to identify the appropriate turbulence model for studying the energy separation effect in a RHVT. Comparison between the numerical and experimental results indicates that the standard k-? model is better than other models in predicting the energy separation phenomenon. The distributions of temperature, pressure, and components of velocity have been obtained in order to understand the flow behavior inside the tube. The effect of cold outlet diameter on temperature drop and refrigeration capacity was studied. The effect of cold mass fraction on the movement of stagnation point and refrigeration capacity has been investigated. Moreover, the feasibility of improving the cooling performance of vortex tube using the cooling system was investigated. The present numerical results revealed that using the cooling system, the net energy transfer rate from cold inner region to the hot peripheral region increases, thereby improving the cooling performance of the device.

Investigation of Performance of Heating and Cooling of Counter Flow Ranque-Hilsch Tubes with L/D=15, 16, 17, 18 for Brass

2013 ◽  
Vol 372 ◽  
pp. 350-353 ◽  
Author(s):  
Kevser Dincer ◽  
Adnan Berber ◽  
Dilek Nur Ozen
Keyword(s):  
Vortex Tube ◽  
Experimental Results ◽  
Counter Flow ◽  
Working Pressure ◽  
Cooling Performance ◽  
Cold Flow ◽  
Heating Performance ◽  
Heating And Cooling ◽  
Maximum Heating ◽  
Vortex Tubes

In this study, heating and cooling performances of counter flow Ranque-Hilsch vortex tubes (RHVTs) were experimentally investigated for brass. The vortex tubes were made of brass. Diameter of vortex tube (D) was 10 mm. Length of vortex tube (L) was 15D, 16D, 17D and18D. The number of nozzles (Nn) was 5. The conical edges of the plugs have a slope of 30o angle. Working pressure of Ranque-Hilsch was 460 kPa (absolute). According to the experimental results, the maximum heating performance of the RHVT system was found to be 39,5 °C at P17 and the maximum cooling performance of the RHVT in this study was found to be-28,6 °C at P18. An increase in fraction of cold flow (ξ) led to a increase in the heating performance.

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