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Auto-ignition of hydrocarbons behind reflected shock waves.The paper reports on the study of auto-ignition of hydrocarbon-oxygen mixtures behind reflected shock waves. Because of their bearing on the problem of knock in internal combustion engines, n-heptane and iso-octane were chosen as the combustible species. Their stoichiometric mixtures with oxygen had to be diluted with 70% argon to reduce the influence of the boundary layer. Photographic records demonstrated the existence of two different modes of ignition, as has been previously established for the hydrogen-oxygen system. The pressure-temperature limits between these regions of mild and strong ignition were determined. From the same experimental tests, induction time data were obtained over the pressure range of 1-4 atm and the temperature interval of 1200-1700 K.
Document ID
19720050336
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Vermeer, D. J.
Meyer, J. W.
Oppenheim, A. K.
(California, University Berkeley, Calif., United States)
Date Acquired
August 6, 2013
Publication Date
June 1, 1972
Publication Information
Publication: Combustion and Flame
Volume: 18
Subject Category
Thermodynamics And Combustion
Report/Patent Number
AFOSR-72-1916TR
AD-749575
Accession Number
72A34002
Funding Number(s)
CONTRACT_GRANT: AF-AFOSR-129-67
CONTRACT_GRANT: NSG-702
CONTRACT_GRANT: NSF GK-22975
CONTRACT_GRANT: NGR-05-003-050
Distribution Limits
Public
Copyright
Other

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