THERMAL SCIENCE

International Scientific Journal

NUMERICAL SIMULATION OF SINGLE-NOZZLE LARGE SCALE SPRAY COOLING ON DRUM WALL

ABSTRACT
In this work the single-nozzle spray cooling on a large-scale industry-used drum wall has been simulated by a verified numerical model. For a certain spray nozzle, the effects of four parameters, i.e. different spray pressures, different spray heights, different water temperatures and different wall temperatures, on heat transfer have been analyzed. It is found that the mean heat flux distributions show concentric elliptical circles. Increasing spray pressures will enhance the cooling performance. Decreasing spray heights will improve the heat flux in direct spray areas other than whole simulated drum wall. As expected, reducing water temperature or advancing wall temperature will rise the average wall flux. Both relationships are exponential. The influencing degrees of the four parameters have been compared through Taguchi orthogonal experimental method and the result is: wall temperature>spray pressure>water temperature>spray height. The wall temperature, spray pressure and water temperature show dominant effects except for the spray height.
KEYWORDS
PAPER SUBMITTED: 2017-09-20
PAPER REVISED: 2017-11-15
PAPER ACCEPTED: 2017-11-17
PUBLISHED ONLINE: 2017-12-03
DOI REFERENCE: https://doi.org/10.2298/TSCI170920243C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE 1, PAGES [359 - 370]
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© 2018 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence