Studies on Vortex Tubes : 2nd Report, Reynolds Number. The Effects of the Cold Air Rate and the Partial Admission of Nozzle on the Energy Separation

Takahama, Heishichiro; Soga, Nobuo

doi:10.1299/jsme1958.9.121

Cited by 19 publications

(11 citation statements)

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“…Similarly, common nozzle geometry is circular and square slot along with the other geometries as seen in Experimental work has been performed by these (Saidi & Valipour, 2003;Promvonge & Eiamsaard, 2005;Dincer, Tasdemir, Baskaya, & Uysal, 2008;Takahama & Soga, 1966;Kirmaci, 2009;Dincer, Avci, Baskaya, & Berber, 2010;Eiamsa-ard, Wongcharee, & Promvonge, 2010;Chang, Li, Zhou, & Qiang, 2011;Mohmmadi & Farhadi, 2013) with regard to nozzle number (Avci, 2013;Bovand, Rashidi, & Esfahani, 2016) and nozzle geometry. Researchers have obtained varying results for effect of nozzle numbers on energy separation.…”

Section: Effect Of Nozzle Number and Nozzle Geometry (Nn)mentioning

confidence: 99%

Parametric Review of Ranque-Hilsch Vortex Tube

Devade¹,

Pise²

2017

AJHMT

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Vortex tube is the device that separates pressurized fluid into hot and cold fluid streams simultaneously. The scientific community has done extensive experimental and theoretical studies since invention of vortex tube to augment the performance of the tube by varying geometrical and operational parameters; the paper deals with parametric review of all such work. The review takes into account effect of almost 14 parameters on performance of vortex tube. It includes developments in tube geometry like L/D ratio, number of nozzles; hot end valve angle and cold orifice diameter etc. are discussed along with different fluids and operational parameters like CMF and stagnation point etc. The focus of most of the theoretical and experimental studies was to investigate mechanism of thermal separation and geometry optimization. The main objective of this review is to discuss efforts made in order to enhance the refrigeration effect so that, missing links could help for future research.

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Section: Effect Of Nozzle Number and Nozzle Geometry (Nn)mentioning

confidence: 99%

Parametric Review of Ranque-Hilsch Vortex Tube

Devade¹,

Pise²

2017

AJHMT

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“…Tubes with cascade and double circuit modes are used. Some authors worked toward the optimum design of tubes …”

Section: Varieties Of Vortex Tube Studiesmentioning

confidence: 99%

Issues and prospects of energy separation in vortex tubes: Review

Devade¹,

Pise²

2017

Heat Trans. Asian Res.

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A vortex tube is a device that separates entering compressed fluid into hot and cold fluid streams simultaneously. This energy separation phenomenon inside the tube is a mystery and the mechanism that causes heat transfer needs attention. Since the invention of the vortex tube, the scientific community has taken efforts to search for energy separation mechanisms. Performance augmentation and the physics of energy separation was the objective of many experimental studies. The performance of the vortex tube varies with changes in geometric and operational parameters. Most of the theoretical studies addressed the issue of energy separation. Prospects and issues of energy separation in a vortex tube in view of the literature is the core of this paper. The main objective is to discuss efforts made in order to justify the physics and to identify new areas for research.

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“…It can be seen that the radial velocity is extremely small when compared to the tangential and axial velocities, except at the inlet zone. At the inlet zone, the radial velocity can reach its maximum mainly due to the partial admission influences of nozzles [11] and the expansion effect. And because the radial velocity is so small compared to the other two components, tests for measuring radial velocity are often neglected on internal studies, and the direction of radial velocity is also often assumed to be inward over the surface of zero axial velocity.…”

Section: A Velocity Distributionmentioning

confidence: 99%

Numerical Investigations of Energy Separation into a Vortex Tube

Zhou

Meng

Liu

2010

2010 Asia-Pacific Power and Energy Engineering Conference

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The flow behaviour inside the vortex tube is quite complex. The fundamental mechanism underlying the energy separation effect is still elusive due in part to a lack of satisfying understanding of flow field and temperature distributions inside the vortex tube. With the aim to disclose the essential mechanisms of energy separation in a vortex tube, it is significant to acquire the distributions of velocity and temperature inside the tube. To investigate this, a threedimensional simulation was performed to predict these distributions inside a counter-flow vortex tube. Based on this prediction, the velocity field and temperature distributions were discussed in detail and the predicted results are supported strongly by previous work. In addition, experiments were carried out with the same physical dimensions and operating conditions used in the numerical simulation model to verify the simulation results. Satisfactory agreement is observed between experimental data and simulation results.

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Studies on Vortex Tubes : 2nd Report, Reynolds Number. The Effects of the Cold Air Rate and the Partial Admission of Nozzle on the Energy Separation

Cited by 19 publications

References 0 publications

Parametric Review of Ranque-Hilsch Vortex Tube

Parametric Review of Ranque-Hilsch Vortex Tube

Issues and prospects of energy separation in vortex tubes: Review

Numerical Investigations of Energy Separation into a Vortex Tube

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