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Measurements of heat transfer to a flat plate in a dissociated high-enthalpy laminar air flow

Published online by Cambridge University Press:  19 April 2006

R. A. East ,
R. J. Stalker  and
J. P. Baird
R. A. East
Affiliation:
Department of Aeronautics & Astronautics, University of Southampton, U.K.
R. J. Stalker
Affiliation:
Department of Mechanical Engineering,
Previously at the Department of Physics, School of General Studies, Australia National University, Canberra.
University of Queensland, Brisbane, Australia
J. P. Baird
Affiliation:
Department of Physics, School of General Studies, Australian National University, Canberra, Australia
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Abstract

Heat-transfer rates from a non-equilibrium hypersonic air flow to flat plates at zero and 12° incidence have been measured in a free piston shock tunnel at stagnation enthalpy levels up to 51 MJ kg−1. Nozzle flow conditions resulted in test section velocities up to 8·1 km 8−1 and in an experimental regime in which the free stream was chemically frozen and the flat-plate boundary layer was laminar. Estimates of the gas-phase and surface-reaction Damkohler numbers have been made and the heat-transfer results are discussed in this context. At the highest test-section densities non-equilibrium endothermic gas phase reactions involving oxygen atoms in the boundary layer are suggested as a possible mechanism for the observed low heattransfer rates.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 97 , Issue 4 , 29 April 1980 , pp. 673 - 699
Copyright
© 1980 Cambridge University Press

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