Forced and mixed convection heat transfer to supercritical CO2 vertically flowing in a uniformly-heated circular tube

Bae, Yoon-Yeong; Kim, Hwan-Yeol; Kang, Deog-Ji

doi:10.1016/j.expthermflusci.2010.06.001

Cited by 193 publications

(30 citation statements)

References 23 publications

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“…In the region with bulk temperature close to and in the vicinity of the pseudo critical point, HTC in the small diameter tube is higher than in the large diameter tube. While the test data obtained by Bae et al [3], who used CO 2 as working fluid in experiment, is consistent with the diameter effect predicted with the D-B correlation in all fluid bulk temperature range. So more research on the diameter effect is needed.…”

Section: Reference Conditionssupporting

confidence: 88%

Experimental studies on heat transfer to supercritical water in circular tubes at high heat fluxes

Zhao

2015

Experimental Thermal and Fluid Science

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Section: Reference Conditionssupporting

confidence: 88%

Experimental studies on heat transfer to supercritical water in circular tubes at high heat fluxes

Zhao

2015

Experimental Thermal and Fluid Science

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“…A good example is the case of fluids at pressures slightly higher than critical pressure when rapid variations in the values of specific heat, density, viscosity and thermal conductivity against temperature is present [1]. In such fluid flows, if the fluid exchanges heat with a solid wall, property variations can be significant in the normal-to-wall direction.…”

Section: Introductionmentioning

confidence: 99%

Buoyancy induced heat transfer deterioration in vertical concentric and eccentric annuli

Forooghi

Abdi

Dahari

et al. 2015

International Journal of Heat and Mass Transfer

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a b s t r a c tTurbulent convection heat transfer of upward fluid flows in vertical annular channels with uniformly heated inner wall and adiabatic outer wall is investigated numerically. Two concentric geometries with outer-to-inner diameter ratios of 2.4 and 3 as well as two eccentric geometries with identical outer-toinner diameter ratio of 2.4 and eccentricities of 0.25 and 0.5 are investigated. Heat transfer deterioration, similar to that of a circular pipe, is observed. The range of buoyancy parameter, over which deterioration is observed, is close to that of circular pipes. Moreover, it is observed that when the value of eccentricity increases, the deterioration phenomenon becomes less pronounced and recovery of heat transfer coefficient occurs earlier, i.e. at lower buoyancy parameters compared to concentric annuli.

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“…The critical pressure and temperature of CO 2 are 7.38 MPa and 31.05 ∘ C, respectively [23]. Two test conditions were simulated.…”

Section: Validation Of the Simulation Methodmentioning

confidence: 99%

Numerical Investigation on Supercritical Heat Transfer of RP3 Kerosene Flowing inside a Cooling Channel of Scramjet

Wang

Pan

Bao

et al. 2014

Advances in Mechanical Engineering

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Supercritical convective heat transfer characteristics of hydrocarbon fuel play a fundamental role in the active cooling technology of scramjet. In this paper, a 2D-axisymmetric numerical study of supercritical heat transfer of RP3 flowing inside the cooling channels of scramjet has been conducted. The main thermophysical properties of RP3, including density, specific heat, and thermal conductivity, are obtained from experimental data, while viscosity is evaluated from a commercial code with a ten-species surrogate. Effects of heat flux, mass flow rate, and inlet temperature on supercritical heat transfer processes have been investigated. Results indicate that when the wall temperature rises above the pseudocritical temperature of RP3, heat transfer coefficient decreases as a result of drastic decrease of the specific heat. The conventional heat transfer correlations, that is, Gnielinski formula, are no longer proper for the supercritical heat transfer of RP3. The modified Jackson and Hall formula, which was proposed for supercritical CO 2 and water, gives good prediction except when the wall temperature is near or higher than the pseudocritical temperature.

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Forced and mixed convection heat transfer to supercritical CO2 vertically flowing in a uniformly-heated circular tube

Cited by 193 publications

References 23 publications

Experimental studies on heat transfer to supercritical water in circular tubes at high heat fluxes

Experimental studies on heat transfer to supercritical water in circular tubes at high heat fluxes

Buoyancy induced heat transfer deterioration in vertical concentric and eccentric annuli

Numerical Investigation on Supercritical Heat Transfer of RP3 Kerosene Flowing inside a Cooling Channel of Scramjet

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