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CHABIČOVSKÝ, M. KOTRBÁČEK, P. BELLEROVÁ, H. KOMÍNEK, J. RAUDENSKÝ, M.
Original Title
Spray cooling heat transfer above leidenfrost temperature
Type
journal article in Web of Science
Language
English
Original Abstract
This study considers spray cooling starting at surface temperatures of about 1200 °C and finishing at the Leidenfrost temperature. Cooling is in the film boiling regime. The paper uses experimental techniques for the study of which spray parameters are necessary for good prediction of spray cooling intensity. The research is based on experiments with water and air-mist nozzles. The following spray parameters were measured together with a heat transfer coefficient: water flowrate, water impingement density, impact pressure, droplet size and velocity. Derived parameters as droplet kinetic energy, droplet momentum and droplet Reynolds number are used in the tested correlations as well. Ten combinations of spray parameters used for correlation functions for the heat transfer coefficient (HTC) are studied and discussed. Correlation functions for prediction of HTC are presented and it is shown which spray parameters are necessary for reliable computation of HTC. The best results were obtained when the parameters impact pressure and water impingement density were used together. It was proven that the correlations based only on water impingement density, which are the most frequent in literature, can not provide reliable results.
Keywords
Continuous casting;Correlation function;Film boiling;Heat transfer coefficient;Heat treatment Leidenfrost temperature;Mist nozzle;Spray cooling;Water nozzle
Authors
CHABIČOVSKÝ, M.; KOTRBÁČEK, P.; BELLEROVÁ, H.; KOMÍNEK, J.; RAUDENSKÝ, M.
Released
1. 9. 2020
Publisher
MDPI
ISBN
2075-4701
Periodical
Metals
Year of study
10
Number
9
State
Swiss Confederation
Pages from
1
Pages to
16
Pages count
URL
https://www.mdpi.com/2075-4701/10/9/1270
Full text in the Digital Library
http://hdl.handle.net/11012/195637
BibTex
@article{BUT165493, author="Martin {Chabičovský} and Petr {Kotrbáček} and Hana {Bellerová} and Jan {Komínek} and Miroslav {Raudenský}", title="Spray cooling heat transfer above leidenfrost temperature", journal="Metals", year="2020", volume="10", number="9", pages="1--16", doi="10.3390/met10091270", issn="2075-4701", url="https://www.mdpi.com/2075-4701/10/9/1270" }