Quasi-steady flames on an evolving atmosphere

Quasi-steady flames on an evolving atmosphere

Clarke, J.F.

Cranfield Institute of Technology, College of Aeronautics

1984-02-01

Theoretical studies of pre-mixed flames are complicated by the fact that the atmosphere ahead of the combustion wave is essentially in a state of disequilibrium. Various devices have been proposed to overcome this difficulty and this paper proposes, and examines, a model that admits from the outset that the basic atmosphere will be undergoing temporal changes, at least. These are allowed to progress, and the flame is superimposed upon them in a manner that allows it to be treated as a quasi-steady combustion wave whose slow evolution is shown to be linked directly with that of the ambient atmosphere itself. The flames are shown to have structures that cover the whole spectrum of possibilities from convection-reaction balances to the conventional thermal-flame-type of wave. Starting in 1946 as the College of Aeronautics, the Cranfield Institute of Technology was granted university status in 1969. In 1993 it changed its name to Cranfield University.

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Cranfield Institute of Technology

College of Aeronautics Report 8406

Aerospace Engineering Reports

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(c) 1984 Cranfield Institute of Technology