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Characteristics of Wetting Temperature and Maximum Heat Flux During Spray Cooling of Hot Surface

[+] Author Affiliations
Yuichi Mitsutake, Masanori Monde

Saga University, Saga, Saga, Japan

Paper No. IHTC14-22795, pp. 763-772; 10 pages
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 6
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4941-5 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME


An experimental investigation has been done to elucidate the effects of mass flux G, degree of subcooling ΔTsub and initial solid temperature Tb0 on transient spray cooling of a downward facing φ89 mm hot block surface. The spray impact diameter was adjusted to φ110mm and φ36mm which simulate uniform and non-uniform spray cooling of the surface. The block made of copper, brass and carbon steel at an initial temperature of 200–500 °C was cooled with subcooled water and ethanol spray. The subcooling was from 10 to 80 K and the mass flux was from 1 to 72 kg/m2 s. Surface temperature and surface heat flux were evaluated with an axisymmetric 2D inverse heat conduction analysis. A transient transition regime was characterized with a wetting temperature and a quenching temperature. The wetting and quenching temperatures were correlated fairly with GΔTsub . Effects of G, ΔTsub , Tb0 and a thermal inertia of the solid (ρcλ)s on a maximum heat flux are evaluated.

Copyright © 2010 by ASME



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