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Pressure waves generated by steady flames.Analysis of pressure waves that can be generated by clouds of explosive gas mixtures in a free atmosphere which is initially at a uniform state. The treatment is restricted only to the final stage of constant flame velocity when the flowfield is self-similar. By the introduction of reduced blast-wave parameters as phase-plane coordinates, the problem is resolved into the determination of the appropriate integral curves on this plane. Results, including space profiles of gasdynamic parameters, have been computed for a specific case of a hydrocarbon-air mixture characterized by a specific heat ratio of 1.3, sound speed at NTP of 345 m/sec, and volumetric expansion ratio corresponding to constant pressure deflagration of 7. Maximum overpressure ratios that can be generated by such flames in point-and line-symmetrical waves range from .00053, for the lower bound in the burning speed, up to 6 for the deflagration, while, for the average speeds of 5 to 10 m/sec, they are at a level of 0.05 to 0.10.
Document ID
19730058006
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Kuhl, A. L.
Kamel, M. M.
Oppenheim, A. K.
(California, University Berkeley, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Thermodynamics And Combustion
Report/Patent Number
AFOSR-74-0213TR
AD-775178
Meeting Information
Meeting: International Symposium on Combustion
Location: University Park, PA
Start Date: August 20, 1972
End Date: August 25, 1972
Accession Number
73A42808
Funding Number(s)
CONTRACT_GRANT: NSF GK-22975
CONTRACT_GRANT: NSG-702
CONTRACT_GRANT: AF-AFOSR-72-2200
Distribution Limits
Public
Copyright
Other

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