Publication detail

Influence of the impact angle and pressure on the spray cooling of vertically moving hot steel surfaces

HNÍZDIL, M. CHABIČOVSKÝ, M. RAUDENSKÝ, M.

Original Title

Influence of the impact angle and pressure on the spray cooling of vertically moving hot steel surfaces

Type

journal article in Web of Science

Language

English

Original Abstract

The cooling of vertically moving strips is used very often to obtain the required material properties. Water spray cooling has to be used when a high cooling intensity is needed. Our Heat Transfer and Fluid Flow Laboratory is equipped with a testing device which allows vertical movement of a heated experimental plate (sheet). Two different sizes of flat-jet nozzles were tested with different water pressures and angles of the water impact (inclination angles of the spraying bar). The water-pressure range was between 2 bar and 9.3 bar and the angle of the water impact changed from 20 deg to 40 deg. The dependence of the heat-transfer coefficient on the surface temperature was evaluated for each experiment. Interesting results were obtained from the comparison of these experimental results, showing that the heat-transfer coefficient and the Leidenfrost temperature increase with the increasing water pressure. Very interesting results were obtained during the tests with different inclination angles. The highest heat-transfer coefficient was obtained for the angle of 20 deg and the lowest value of the heat-transfer coefficient was obtained for the angle of 40 deg at the surface temperatures of around 200 degrese of Celsius.

Keywords

spray cooling, flat jet nozzles, impact angle, water impingement density, Leidenfrost temperature

Authors

HNÍZDIL, M.; CHABIČOVSKÝ, M.; RAUDENSKÝ, M.

RIV year

2015

Released

1. 5. 2015

Publisher

Insitute of Metals and Technology, Ljubljana, Slovenia

Location

LJUBLJANA SLOVENIJA

ISBN

1580-2949

Periodical

Materiali in tehnologije

Year of study

49

Number

3

State

Republic of Slovenia

Pages from

333

Pages to

336

Pages count

4

URL

http://mit.imt.si/Revija/

BibTex

@article{BUT114425,
  author="Milan {Hnízdil} and Martin {Chabičovský} and Miroslav {Raudenský}",
  title="Influence of the impact angle and pressure on the spray cooling of vertically moving hot steel surfaces",
  journal="Materiali in tehnologije",
  year="2015",
  volume="49",
  number="3",
  pages="333--336",
  doi="10.17222/mit.2013.239",
  issn="1580-2949",
  url="http://mit.imt.si/Revija/"
}