22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-5.5.1

TEMPERATURE AND CONVECTIVE HEAT TRANSFER COEFFICIENT PROFILES DOWNSTREAM A MULTIPERFORATED PLATE - APPLICATION TO COMBUSTION CHAMBER COOLING

B. Petre, E. Dorignac,J. J. Vullierme
Laboratoire d’Etudes Thermiques, U.M.R. C.N.R.S 6608-ENSMA, France

Keywords: full coverage film cooling, rows number, blowing rate, temperatures probings, convection heat transfer coefficient.

In this study, we take an interest in the full coverage film cooling, which is utilised to protect the combustion chamber walls. It consists in injecting cooling air coming from compressors through drilled holes. Those are often placed in staggered configuration like our case. This experimental study is based on temperatures and convection heat transfer coefficient profiles obtained upstream one from nine rows of holes. Three thermal cases are imposed with three blowing rates and for a same mainstream Reynolds Number. Profiles are obtained by thermocouples probings. It appears that five rows are necessary to form a protecting cold layer.

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