Influence of Pressure on Stable Film Boiling of Subcooled Liquid

Zabirov, A R; Yagov, V. V.; Kaban’kov, O. N.; Leksin, M. A.; Kanin, Pavel K.

doi:10.1007/s10891-016-1515-4

Cited by 17 publications

(3 citation statements)

References 5 publications

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“…Analysis of the results of the experiments leads to the conclusion that the regime of intensive heat transfer during film boiling of a subcooled liquid may occur only under unsteady process of cooling conditions. The characteristic heat flux densities with pool boiling (in a large volume) are higher than those obtained for steady film boiling of subcooled water at a high rate of forced flow [10]. This conclusion is confirmed by strong effect of the thermal effusivity coefficient of a metal on the temperature of the cooled surface at which this mode begins: when stainless steel balls are immersed in water with a temperature of 30°C, intensive cooling is observed almost immediately at T w > 700°C, whereas the corresponding T w values for nickel and copper balls were noticeably lower [9].…”

Section: Heat and Mass Transfer And Physical Gasdynamicsmentioning

confidence: 60%

“…It is found that in water subcooled by ΔT sub > 20-30 K, microbubble boiling occurs when the samples made of materials with very different properties (stainless steel, nickel, and copper) are cooled. As far as is known, the temperature of a cooled ball is measured in such experiments at the center and at several points on the surface rather than at one point only in [7][8][9][10][11][12][13]. The presence of several surface thermocouples enables us to determine reliably the temperature of occurrence of the intensive cooling mode, the velocity of the cooling front propagation over the surface, and the rate of the ball cooling.…”

Section: Heat and Mass Transfer And Physical Gasdynamicsmentioning

confidence: 99%

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Effect of Coating by a Carbon Nanostructure on Heat Transfer with Unsteady Film Boiling

et al. 2019

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We present the results of an experimental study of heat transfer regimes during cooling in water of high-temperature, heated steel balls with a technically smooth and modified surface. The modification consisted of the application of a finely dispersed carbon coating to the surface followed by electron beam treatment. When the samples are placed in subcooled water, an intensive heat transfer regime occurs on the both samples; it appeared upon film boiling with heat fluxes on the surface up to 6 MW/m 2 . The heat flux values based on the initial cooling thermograms were obtained from a one-dimensional inverse heat conduction problem. The carboncoating leads to a decrease in the surface temperature, which corresponds to the transition to the intensive cooling mode, whereas the intensive cooling mode itself is identical for samples with the different surface treatments. Experimental results confirm the approximate model proposed for the conditions for the occurrence of the intensive cooling regime during film boiling of a subcooled liquid.

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Section: Heat and Mass Transfer And Physical Gasdynamicsmentioning

confidence: 60%

Section: Heat and Mass Transfer And Physical Gasdynamicsmentioning

confidence: 99%

Effect of Coating by a Carbon Nanostructure on Heat Transfer with Unsteady Film Boiling

et al. 2019

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“…Over the past 10 years, our research team has conducted an extensive series of experimental work on various liquids and metals under different conditions [5][6][7][8][9][10]. The compressed results are shown in Table 1 and 2.…”

Section: Introductionmentioning

confidence: 99%

Pressure influence on film boiling of mixtures

Zabirov¹,

Yagov²,

Kanin³

et al. 2019

Proceedings of the 6th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT'19)

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A unique experimental work was carried out to study the laws governing the cooling of subcooled water-ethanol mixtures under pressures up to 0.5 MPa. The great intensification of quenching was recorded with increasing pressure and mass fraction of water in ethanol. At some conditions the transition temperature to the intensive boiling regime noticeably exceeded the critical temperature of the liquid (when direct liquid-solid contact is impossible).

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