Experimental and 3d-CFD Study on Optimization of Control Valve Diameter for a Convergent Vortex Tube

Rafiee, Seyed Ehsan; Mohammadkhani, Farzad

doi:10.5098/hmt.7.13

Cited by 5 publications

(3 citation statements)

References 49 publications

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“…Air was used as the working fluid. Rafiee and Sadeghiazad (2016) carried out parametric optimization for separation performance using experimental methods and 3D-CFD simulation. Manimaran (2016) had calculated energy separation by simulating a three dimensional flow field in Ranque-Hilsch vortex tube.…”

Section: Fig 1 Components Of a Rhvt And Its Inlet And Outlet Streammentioning

confidence: 99%

1-D Model for Mass Transfer Calculation in Vortex Tube using Heat and Mass Transfer Analogy

Chatterjee¹,

Mukhopadhyay²,

Vijayan³

2017

AJHMT

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This work introduces a new mathematical model that predicts the mass transfer in a counter current Ranque Hilsch Vortex Tube. The model requires experimental thermal gradient and calculates axial concentration gradient of the heavier species of a binary mixture as mass transfer takes place between two parallel streams moving from inlet towards the hot outlet. The well established Chilton Colburn analogy is used within its applicable range to determine the mass transfer coefficient based on the heat transfer coefficient. The heat transfer coefficient is calculated using Seider-Tate correlation. The model can predict axial concentration gradient of the heavier species in both enriched and depleted stream along the length of the Ranque Hilsch Vortex Tube and mass separation factor. The model is validated with data obtained from experiments conducted with three different vortex generators with variable inlet flow rate. Comparison of the predictions from the model and experimental results shows that the new model can predict the experimental results quite well for a range of flow rate from 0.01 m 3 /s to 0.03 m 3 /s and hot end valve opening values ranging from 1.0 to 4.5 turns. The variation of mass separation factor is also examined with inlet feed flow rate and hot end valve opening values. Air as a binary mixture of nitrogen and oxygen is considered as the working fluid.

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Section: Fig 1 Components Of a Rhvt And Its Inlet And Outlet Streammentioning

confidence: 99%

1-D Model for Mass Transfer Calculation in Vortex Tube using Heat and Mass Transfer Analogy

Chatterjee¹,

Mukhopadhyay²,

Vijayan³

2017

AJHMT

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“…Rafiee and Sadeghiazad [19,20] managed some experimental setups to optimize the control valve structural parameters such as the conical angle and the cone length and proved that there are some optimized values which lead to the best thermal capability. The impact of a new shape of the hot tube (the convergent main tube) is experimentally tested by Rafiee et al [21] and Rafiee and Sadeghiazad [22][23][24][25][26]. Their results stated that there is an optimized angle for the convergent main tube to produce the best cooling capacity.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on thermal performance of double circuit vortex tube (DCVT) - Effect of heat transfer controller angle

Mohammadkhani¹

2017

IJHT

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The patterns of heat and mass transfer can be changed using various heat transfer controller angle in Double Circuit vortex tube (DCVT). In this parametric/experimental test, the effective parameter is focused on the heat transfer controller angle in DCVT. The heat transfer controller angle is considered over the range of 20 to 80 degree. The experimental tests indicate that the heat transfer angle should be small and not more than 75 under our experimental tests so there is an optimal heat transfer angle of controller to achieve the highest cooling efficiency. The preliminary experimental results indicate that θ=75 yields the highest cold temperature reduction, which exceeds θ=20 one by about 51.23%. In fact, the optimum model before the optimization was θ=70. Also, The ratio of actual cold temperature difference to the maximum temperature difference, ΔTc / (ΔTc)max, for the vortex tube with truncated cone control valve can be presented as a function of the cold mass ratio.

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“…control valve [9], cold mass fraction ratio, and the number of nozzles [10] to be more effective and efficient. Different VT geometry as a parameter to determine the optimization of VT performance [11].…”

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confidence: 99%

Optimization of Vortex Tube Design and Performance for Cooling Milling Process

Sifa,

Endramawan,

Safi'i

et al. 2023

IJIE

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The manufacturing process is required to improve cleanliness and reduce environmental pollution and the exploration of natural resources is limited. One of the manufacturing processes is machining, especially the milling process. The phenomenon during the milling process friction occurs when the workpiece is cut by the milling tool, the effect friction between tool and workpiece occurs temperature rise. To reduce the temperature rise of the milling tool during the workpiece cutting process, an effective and efficient alternative cooling is needed through the use of vortex tubes. The research method was carried out using the Computational Fluid Dynamic (CFD) approach and experiments with the use of inlet pressure = 1-5 Bar, and the parameters of variations in valve shape, number of nozzles, and pipe lengths. The overall results of the CFD and experiment of parameters in inlet pressure on the number of nozzles, valve shapes, and tube lengths, have an impact on the increasing inlet pressure, the higher the thermodynamic characteristics that occur in the vortex tube, but there is a loss of outlet pressure in each parameter. The geometry of the vortex tube selected is the number of nozzles 6, valve fillet shape, and tube length of 50 mm, vortex tube can be used for cooling the milling tool with the addition of a flexible hose at a distance of 5 cm from the tooltip.

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Experimental and 3d-CFD Study on Optimization of Control Valve Diameter for a Convergent Vortex Tube

Cited by 5 publications

References 49 publications

1-D Model for Mass Transfer Calculation in Vortex Tube using Heat and Mass Transfer Analogy

1-D Model for Mass Transfer Calculation in Vortex Tube using Heat and Mass Transfer Analogy

Experimental study on thermal performance of double circuit vortex tube (DCVT) - Effect of heat transfer controller angle

Optimization of Vortex Tube Design and Performance for Cooling Milling Process

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