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Annals of the Assembly for International Heat Transfer Conference 13

ISBN 1-56700-225-0 / CD 1-56700-226-9

Volumes per year:

various

Year 2006

DOI: 10.1615/IHTC13.p26

FLAME TO PLATE HEAT TRANSFER CHARACTERIZATION

R. Loubat
Airbus - F / ESANT, Toulouse, France

B. Estebe
Airbus - F / ESANT, Toulouse, France

Y. Murer
Airbus - F / ESANT, Toulouse, France

P. Reulet
ONERA DMAE/ATAC, 2 Av. E. Belin 31055 Toulouse Cedex 04, France

Pierre Millan
ONERA DMAE/ATAC, 2 Av. E. Belin 31055 Toulouse Cedex 04, France

ABSTRACT

An inverse measurement technique previously validated on a hot air jet impingement campaign is now confronted to flame to wall heat transfer characterization. The former study had introduced a decomposition technique allowing the computation of radial profiles for the adiabatic wall temperature and its associated convective heat transfer coefficient. Since the nature of the flame is different from hot jets, this analysis technique was adapted in order to take into account for the radiative contribution of combustion products, and flame front.
First, the overall measurement / inversion / heat flux decomposition process is presented. Next, a low Reynolds propane-air flame impingement application is proposed. The test bench is described. Temperature measurements performed via infrared camera on the non-impinged face of a titanium plate are used as input of in-house non-linear 3D finite volume inverse software. Next, two heat flux decomposition techniques are proposed in order to evaluate the convection / radiation ratio, and results are compared in this paper, showing a good matching.
Finally, the heat flux measurement and result analysis process is confronted to a high pressure sonic kerosene flame, representative of fire conditions in aircraft engines. The flame characterization brings interesting results as well as better understanding on this poorly documented case.