A novel steady-state technique for measuring the heat extracted by secondary cooling sprays

C. A. Hernández, A. H. Castillejos, F. A. Acosta, X. Zhou, B. G. Thomas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a new technique for measuring the steady-state heat flux extracted locally by water sprays or air-mists impinging upon the surface of a hot metallic body. The technique is based on balancing the induction heating of a metallic sample with the heat removed by the boiling of spray droplets impinging on its exposed surface. Measurement of the RMS current flowing through the induction coil for maintaining a desired sample temperature, together with the solution of a two-dimensional axisymmetric computational model of the electromagnetic and heat conduction equations, enable estimation of the heat extracted by the cooling spray. Heat fluxes are reported for spray cooling of a Pt sample at temperatures spanning from 200-1200°C, using air-mist nozzles and operating conditions relevant to continuous casting of thin steel slabs. The results demonstrate the flexibility of the technique for investigating different aspects of spray cooling.

Original languageEnglish (US)
Title of host publicationAISTech 2010 - Proceedings of the Iron and Steel Technology Conference
Pages81-92
Number of pages12
StatePublished - 2010
EventAISTech 2010 Iron and Steel Technology Conference - Pittsburgh, PA, United States
Duration: May 3 2010May 6 2010

Publication series

NameAISTech - Iron and Steel Technology Conference Proceedings
ISSN (Print)1551-6997

Other

OtherAISTech 2010 Iron and Steel Technology Conference
CountryUnited States
CityPittsburgh, PA
Period5/3/105/6/10

Keywords

  • Boiling heat flux
  • Continuous casting
  • Measuring apparatus
  • Secondary cooling
  • Steady-state test

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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