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Research Papers: Evaporation, Boiling, and Condensation

A Generalized Critical Heat Flux Correlation for Submerged and Free Surface Jet Impingement Boiling

[+] Author and Article Information
Ruander Cardenas

School of Mechanical, Industrial,
and Manufacturing Engineering,
Oregon State University,
Corvallis, OR 97331-6001
e-mail: ruander@outlook.com

Vinod Narayanan

School of Mechanical, Industrial,
and Manufacturing Engineering,
Oregon State University,
Corvallis, OR 97331-6001

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 20, 2013; final manuscript received April 4, 2014; published online May 28, 2014. Assoc. Editor: W. Q. Tao.

J. Heat Transfer 136(9), 091501 (May 28, 2014) (9 pages) Paper No: HT-13-1251; doi: 10.1115/1.4027552 History: Received May 20, 2013; Revised April 04, 2014

A critical heat flux (CHF) correlation is developed for jet impingement boiling of a single round jet on a flat circular surface. The correlation is valid for submerged jets as well as for free surface jets with Reynolds numbers (Re) between 4000 and 60,000. Data for the correlation are obtained from an extensive experimental study of submerged jet impingement boiling performed by the authors with water at subatmospheric pressures and with FC-72 at atmospheric pressure. Additional experimental data from a free surface jet study are also incorporated to include the effect of variation in surface diameter relative to a fixed nozzle diameter, additional working fluids (water and R-113 both at atmospheric pressure), and jet configuration. The range of parameters considered include Re from 0 (pool boiling) to 60,000, jet diameter to capillary length scale ratios (dj/Lc) ranging from 0.44 to 5.50, surface diameter to capillary length scale ratios (ds/Lc) ranging from 4.47 to 38.42, and liquid-to-vapor density ratios from 119 to 8502. The proposed correlation is built on the framework of a forced convective CHF model. Using this correlation, 95% of the experimental CHF jet impingement data can be predicted within ±22% error. The corresponding average absolute error and the maximum absolute error are 8% and 36%, respectively, over the range of parameters considered.

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References

Figures

Grahic Jump Location
Fig. 1

Comparison of water CHF jet impingement data [15,18] with correlations at a pressure of P = 0.276 bars: ◻ C.1; C.2; C.3; C.4; C.5; C.6; C.7; +C.8; ×C.9; C.10; C.11; * C.12; • 123 nm Ra surface, ▲ 33 nm Ra surface. Note that these correlations do not cover the subatmospheric conditions of the experimental dataset (large liquid-to-vapor density ratio).

Grahic Jump Location
Fig. 2

Comparison of FC-72 CHF data with correlations for dj = 2.29 mm: ◻ C.1; C.2; C.3; C.4; C.5; C.6; C.7; +C.8; ×C.9; C.10; C.11; * C.12; • experimental data from Cardenas and Narayanan [16-18]

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Fig. 3

Comparison of R-113 CHF data with correlations for ds = 11.6 mm: ◻ C.1; C.2; C.3; C.4; C.5; C.6; C.7; +C.8; ×C.9; C.10; C.11; * C.12, • experimental data from Monde and Katto [1]

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Fig. 4

Comparison of atmospheric water CHF data with correlations for ds = 11.2 mm: ◻ C.1; C.2; C.3; C.4; C.5; C.6; C.7; +C.8, ×C.9; C.10; C.11; * C.12; • experimental data from Monde and Katto [1]

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Fig. 5

Overall comparison of the proposed CHF model predictions with the experimental data

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Fig. 6

Proposed CHF model prediction of experimental submereged jet impingement data: (a) water 123 nm surface, (b) water 33 nm surface, (c) FC-72 33 nm surface, as a function of Re

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Fig. 7

Proposed CHF model prediction of experimental free surface jet impingement data of Monde and Katto [1] and their correlation for (a) R-113, (b) water, as a function of Re

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