An experimental research on a small flow vortex tube at low temperature ranges

Liu, J.Y.; Gong, Maoqiong; Wu, Jiao; Cao, Yingnan; Luo, Ercang

doi:10.1016/b978-008044559-5/50039-9

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The majority of available literature is focused on energy separation with gaseous air at normal atmospheric temperature as the working fluid. However, recent studies [24][25][26][27][28] reflect that the VT working at cryogenic temperature (temperature range below 123 K) with liquid-vapour twophase air has the potential to separate air into its main constituents: oxygen and nitrogen. When compressed twophase air at cryogenic temperature is injected into the VT, energy separation as well as mass transfer takes place inside the tube.…”

Section: Introductionmentioning

confidence: 99%

“…In the present work, a CFD model is used to investigate the energy separation in the VT with gaseous air at cryogenic temperature as the working fluid using the CFD software FLUENT 6.3.26. Since the published literature on experimental or theoretical investigation on energy separation at cryogenic temperature is scarce [28], the CFD model presented in our previous work [17] for the VT operating with gaseous air at normal atmospheric temperature is used here. The flow parameters inside the tube are analyzed to investigate the energy separation mechanism.…”

Section: Introductionmentioning

confidence: 99%

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CFD Analysis of Energy Separation in Ranque-Hilsch Vortex Tube at Cryogenic Temperature

2013

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Study of the energy separation phenomenon in vortex tube (VT) at cryogenic temperature (temperature range below 123 K) has become important because of the potential application of VT as in-flight air separator in air breathing propulsion. In the present study, a CFD model is used to simulate the energy separation phenomenon in VT with gaseous air at cryogenic temperature as working fluid. Energy separation at cryogenic temperature is found to be considerably less than that obtained at normal atmospheric temperature due to lower values of inlet enthalpy and velocity. Transfer of tangential shear work from inner to outer fluid layers is found to be the cause of energy separation. A parametric sensitivity analysis is carried out in order to optimize the energy separation at cryogenic temperature. Also, rates of energy transfer in the form of sensible heat and shear work in radial and axial directions are calculated to investigate the possible explanation of the variation of the hot and cold outlet temperatures with respect to various geometric and physical input parameters.

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