Abstract
The local heat flux of spray cooling in the film boiling region were experimentally investigated for the spray region of DSUBmax/SUB = 0.005~0.03 ㎥/(㎡s). A twin-fluid full cone spray nozzle was employed for the experiment and the distributions of droplet flow rates were obtained for air-water full cone sprays. A stainless steel block was cooled down from initial temperature of about 800 ℃ by full cone spray. In the region near the stagnation point, it was found that the experimental data are in good agreement with the results predicted from the correlations between the local heat transfer and the local droplet flow rate proposed in the previous report. However, it was found that the experimental data of DSUBr/SUB ＞ 0.01 ㎥3/(㎡s) are a little smaller than the results predicted from the correlations.
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