A geometric model for a vortex tube based on numerical analysis to reduce the effect of nozzle number

Shamsoddini, Rahim; Abolpour, Bahador

doi:10.1016/j.ijrefrig.2018.07.027

Cited by 26 publications

(8 citation statements)

References 33 publications

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“…In addition, previous studies also showed that parallel connections of vortex tubes resulted in more effective results [11,23]. As to the effect of nozzle material, metallic materials of relatively high thermal conductivity were found to be more effective on ΔT [15,17,45].…”

Section: Results Of Taguchi Methodsmentioning

confidence: 98%

“…Accordingly, choosing the codes of connection type and nozzle materials which are negative multipliers in the regression equation will lead to an increase in ∆T value. When the previous studies are examined, it is seen that increasing inlet pressure and number of orifices improves the performance of RHVTs [14][15][16] and that metal-based nozzle material gives better results than plastic-based one [15,17]. In addition, it is also seen from the previous studies that connection types in RHVTs influence their performance and that parallel connections increase the ∆T values [23].…”

Section: Multiple Linear Regression Analysismentioning

confidence: 89%

“…By the effect of centrifugal and pressure difference, while the temperature of compressed fluid rises at internal walls of vortex, it decreases towards vortex centre. With this working principle, hot and cold fluid has been separated from each other [1,15,40,41]. Working principle of the RHVT used in this study, flow formation and nozzles (Brass and Polyamide) are given in Fig.…”

Section: Experimental Setup and Used Devicesmentioning

confidence: 99%

“…In order to reduce the number of orifices in vortex tubes, they developed a new geometry and carried out a numerical study. They stated that the developed new model was effective on the prediction of vortex performance [15]. Hamdan et.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Ranque–Hilsch vortex tube performances via Taguchi method

Gökçe

2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, by considering the changes in inlet pressures, connection nozzle materials and the number of orifices, the performances of Ranque-Hilsch vortex tubes (RHVTs) were modelled by multiple linear regression method at which carbon dioxide (CO 2) was used as compressed fluid, and optimum operating conditions were tried to be determined by Taguchi method. In the experiment, counterflow RHVTs having Ø10 mm inner diameter and 100 mm body length were used, hot fluid outlet of which was left completely open. In the tests designed using Taguchi L16 mix type (8 × 1 2 × 3) orthogonal array, 8 different inlet pressures (200, 250, 300, 350, 400, 450, 500 and 550 kPa), 2 different types of connections (parallel and series), 2 different types of nozzle materials (brass and polyamide) and 2 different numbers of orifices (4 and 6) were chosen as control factors and levels. Maximum temperature gradient (∆T) was determined as quality characteristics, and RHVT's performance tests were done. In order to determine the effect rates of selected control factors on quality characteristics (∆T), analysis of variance (ANOVA) was applied within 95% confidence level. According to the statistical results, it was determined that ΔT values were mostly influenced by the inlet pressure and this was followed by connection type, number of orifices and nozzle material. With the confirmation test performed, reliability of the optimization was tested and confirmed.

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Section: Results Of Taguchi Methodsmentioning

confidence: 98%

Section: Multiple Linear Regression Analysismentioning

confidence: 89%

Section: Experimental Setup and Used Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of Ranque–Hilsch vortex tube performances via Taguchi method

Gökçe

2020

J Braz. Soc. Mech. Sci. Eng.

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“…A simple but active modification to the RHVT by converting its sharp circumferential edge to a half-circular profile around the mixing chamber edge ( Figure 21) is made by R. Shamsoddini, and B. Abolpour (2018) [11] which can serve as an economical manufacturing purpose through the reducing of the utilized number of injection nozzles.…”

Section: The Nozzles Configurationmentioning

confidence: 99%

A review on the vortex tube geometrical affecting paramters

Abdulhussain

2020

Journal of Mechanical and Energy Engineering

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One of the increased usability energy separation devices that deals with compressed fluids such as the air, the water, and several Refrigerants are the Ranque-Hilsch vortex tube due to its simple operating principle to separate the compressed fluid to two hot and cold streams. The aim of the current paper is to review the Ranque-Hilsch tube flow separation most affecting geometrical parameters influencing the thermal separation efficiency in the literature that are conducted numerically and experimentally such as the number of injection nozzles and their cross-sectional shape including the rectangular and the trapezoidal for straight constant and converged nozzle profiles as well as the helical swept nozzle configurations like the nozzles aspect and the convergence ratios, the variation of the helical profile pitch angle with the increase in the nozzles number is also considered in the survey, further geometrical parameters survey is performed that includes the vortex tube orifice size to the nozzle's length dimensional ratio and also the vortex tube configuration like the divergent and the convergent/divergent vortex tube shapes characteristics that includes the divergent angle and the throttling zone size in addition to the vortex tube length to the hot exit port size ratio and the optimum conical valve shape position and tapering angle.

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