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Chemical amplification at the wave head of a finite amplitude gasdynamic disturbance

Published online by Cambridge University Press:  12 April 2006

J. F. Clarke
J. F. Clarke
Affiliation:
Department of Aerodynamics, Cranfield Institute of Technology, Bedford MK43 0AL, England
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Abstract

Consider a background state which consists of a spatially uniform chemically reactive mixture in a general state of disequilibrium. The analytical method of characteristics is used to show that a plane finite amplitude disturbance propagates through this system at the frozen sound speed and, if the degree of disequilibrium is sufficient, is amplified by the chemical reaction. Some comments are made about the time to shock-wave formation and its relation to the homogeneous explosion ignition time, and also about expansion waves, which are found to have a tendency towards fixed-strength ‘quenching waves’, their strength being proportional to the extent of the ambient disequilibrium.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 81 , Issue 2 , 24 June 1977 , pp. 257 - 264
Copyright
© 1977 Cambridge University Press

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References

Clarke, J. F. 1973 Combust. Sci. Tech. 7, 241.
Clarke, J. F. 1974 Quart. J. Mech. Appl. Math. 27, 161.
Clarke, J. F. & McChesney, M. 1976 Dynamics of Relaxing Gases. Butterworths.
Srinivasan, J. & Vincenti, W. G. 1975 Phys. Fluids 18, 1670.