Detail publikace

Influence of the surface roughness on the cooling intensity during spray cooling

BROŽOVÁ, T. CHABIČOVSKÝ, M. HORSKÝ, J.

Originální název

Influence of the surface roughness on the cooling intensity during spray cooling

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

The surface roughness plays an important role during spray cooling of hot surfaces in a presence of the boiling. Bubbles are formed in small cavities on the surface during nucleate pool boiling. Enhanced surface roughness causes that more bubbles are formed and it causes increased cooling intensity. The surface with increased roughness has also bigger surface area, which allows higher heat flow between surface and surrounding water. The influence of the surface roughness during pool boiling was investigated by many authors. The increased surface roughness causes shift of the Leidenfrost temperature to higher temperatures and increases critical heat flux during pool boiling. The influence of the surface roughness during spray cooling of hot surfaces was not still sufficiently investigated and it is not known if the effect of the surface roughness is similar like in a case of the pool boiling. Experiments for describing the effect of the surface roughness on the cooling intensity were conducted with water nozzle with flat jet. Test samples were heated in a protective atmosphere at a temperature 730 ºC and then cooled to the room temperature. Test samples were made of the austenitic stainless steel to minimize the forming of the scales on the surface. Results shoving influence of the surface roughness on the critical heat flux and on the Leidenfrost temperature are presented.

Klíčová slova

surface roughness, spray cooling, Leidenfrost temperature, critical heat flux, heat transfer coefficient

Autoři

BROŽOVÁ, T.; CHABIČOVSKÝ, M.; HORSKÝ, J.

Vydáno

25. 5. 2016

Nakladatel

TANGER Ltd.

Místo

Ostrava

ISBN

978-80-87294-67-3

Kniha

METAL 2016, 25rd International Conference on Metallurgy and Materials, Conference Proceedings

Strany od

41

Strany do

46

Strany počet

6

URL

http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=3&SID=1FrthULdZ1E22feXqwd&page=1&doc=1

BibTex

@inproceedings{BUT125891,
  author="Tereza {Kůdelová} and Martin {Chabičovský} and Jaroslav {Horský}",
  title="Influence of the surface roughness on the cooling intensity during spray cooling",
  booktitle="METAL 2016, 25rd International Conference on Metallurgy and Materials, Conference Proceedings",
  year="2016",
  pages="41--46",
  publisher="TANGER Ltd.",
  address="Ostrava",
  isbn="978-80-87294-67-3",
  url="http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=3&SID=1FrthULdZ1E22feXqwd&page=1&doc=1"
}