A similarity relation for energy separation in a vortex tube

Stephan, Karl; Song, Lin; Durst, M.; Huang, Feng; Seher, D.

doi:10.1016/0017-9310(84)90012-7

Cited by 57 publications

(33 citation statements)

References 9 publications

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“…The maximum value of specific heat capacity ratio and minimum molecular weight of helium was stated as the reason for its superior cooling performance. However, this explanation is not convincing, due to the significantly different tube performance from other publications [30,31]. Moreover, the results were achieved based on inappropriate parameters, i.e.…”

Section: Introductioncontrasting

confidence: 43%

“…It has, furthermore, been reported that the cooling performance of a vortex tube depends on the properties of the working gases. In terms of the cooling performance, argon and helium have been found to have a better performance than any other gas, including carbon dioxide, air, ammonia, nitrogen, oxygen and water vapour [30,31]. A previous numerical investigation on the cooling effect of a vortex tube, considering carbon dioxide, air, helium, ammonia, nitrogen, oxygen and water vapour, reported the agreement of the helium's best cooling effect [32].…”

Section: Introductionmentioning

confidence: 68%

“…It has generally been observed that the working gases, within a tube, expand differently, due to their dissimilar properties. This difference principally indicates the significant impact of the gas property on both the temperature variation in the expansion process, as well as the cooling performance of the vortex tube [30,[34][35][36][37][38]. Based on the diverse cooling performance of a vortex tube through the use of different working fluids, further analysis of the expansion process is conducted to identify the impact of the fluid property and hence to contribute to the understanding of the expansion process.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Expansion Process in a Counter-flow Vortex Tube

2015

J Vortex Sci Technol

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The process of temperature separation in a Ranque-Hilsch vortex tube is dependent on a multitude of factors, such as the pressure gradients, flow stagnation and mixture, energy transfer between different flow layers and heat transfer between the tube and the ambient air. The pressure gradient in an expansion process within a vortex tube has been proposed as the dominating reason for the temperature drop. However, at present, there is no general agreement within the research community for the expansion process itself, primarily due to the complexity of the internal flow conditions in the tube. Therefore, in the present article, a deeper insight into the separation mechanism within a vortex tube is presented, based on an analytical analysis using different expansion models, including isentropic expansion, free expansion and Joule-Thomson expansion. It was observed that the isentropic expansion is the only possible expansion process within a vortex tube. This was confirmed through comparison with experimental results obtained from different sources. The Expansion Process in a Counter

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Section: Introductioncontrasting

confidence: 43%

Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

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The Expansion Process in a Counter-flow Vortex Tube

2015

J Vortex Sci Technol

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“…Tabela 3 -Dimensões principais do tubo de vórtices (STEPHAN et al, 1984) Figura 32. Variação de temperatura do fluxo frio em função da fração de fluxo frio (STEPHAN et al, 1984) A performance de um tubo de vórtices é uma função de diversas variáveis.…”

Section: Stephan Et Al (1984) Obteve Resultados Da Variação De Tempeunclassified

“…Variação de temperatura do fluxo frio em função da fração de fluxo frio (STEPHAN et al, 1984) A performance de um tubo de vórtices é uma função de diversas variáveis. O processo de separação energética em um tubo de vórtices, é dependente das variáveis citadas na equação 10, conforme estudo de Stephan et al (1983).…”

Section: Stephan Et Al (1984) Obteve Resultados Da Variação De Tempeunclassified

Estudo de um sistema alternativo de ar condicionado automotivo baseado na aplicação de tubos de vórtice utilizando o conceito de regeneração energética.

Itáo¹

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Detailed thermodynamics for analysis and design of Ranque‐Hilsch vortex tubes

O’Connell

2017

AIChE Journal

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The Ranque‐Hilsch vortex tube is a device for continuously separating an inlet pressurized fluid stream into two outlet streams of warmer and cooler temperatures at lower pressures, with no moving parts and without any heat or work effects. It has been applied to cool or heat small systems where refrigeration is impractical. Studies of the fluid mechanics inside the tube have not fully established the flow structure that provides the separation. Thermodynamic energy and entropy balances giving relations among properties and the relative amounts of the three fluid streams have been examined to determine consistency among measured data along with sensitivity of the phenomena to tube configuration, measurement error, and properties. The strong response of the temperature separation to small variations in entropy generation is shown to limit the possibilities for generalized prediction of vortex tube behavior. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1067–1074, 2018

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A similarity relation for energy separation in a vortex tube

Cited by 57 publications

References 9 publications

The Expansion Process in a Counter-flow Vortex Tube

The Expansion Process in a Counter-flow Vortex Tube

Estudo de um sistema alternativo de ar condicionado automotivo baseado na aplicação de tubos de vórtice utilizando o conceito de regeneração energética.

Detailed thermodynamics for analysis and design of Ranque‐Hilsch vortex tubes

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