Publication detail

Spray cooling heat transfer above leidenfrost temperature

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

16

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"
}