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The Spontaneous Ignition of Isooctane Air Mixtures under Steady Flow Conditions
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Event:
Mid-Year Meeting
Language:
English
Abstract
The thermochemical changes occurring prior to spontaneous ignition were investigated for homogeneous mixtures of 2,2,4 trimethylepentane (isooctane) and air in a steady flow apparatus of unique design. Measurements were also made of the ignition times of these mixtures over a range of pressures, temperatures, and fuel-air ratios.
Most of the observable thermodynamic and chemical changes occurred in the last 10–25% of the ignition period. Principal among these changes were thermal decomposition of the isooctane to form isobutylene and probably isobutane; the appearance of significant quantities of propylene, ethylene, methane, hydrogen, carbon monoxide, and carbon dioxide; and a temperature rise of from about 200 to500 F.
Most significant among the results was the observation that the preignition changes for the entire range of conditions tested correlate with a normalized reaction time.
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Citation
Burwell, W. and Olson, D., "The Spontaneous Ignition of Isooctane Air Mixtures under Steady Flow Conditions," SAE Technical Paper 650510, 1965, https://doi.org/10.4271/650510.Also In
References
- Jost W. “Explosion & Combustion Processes in Gases,” McGraw-Hill Book Co. New York 1946 32 46
- Mullins B. P. “Spontaneous Ignition of Liquid Fuels Agardograph #4.” Butterworths London 1955
- Falk, K. G. “The Ignition Temperature of H 2 - O 2 Mixtures.” J. Am. Chem. Soc 28 1906 1517
- Steinberg M. Kaskan W. E. “The Ignition of Combustible Mixtures by Shock Waves,” 5th Symposium (International) on Combustion Reinhold Publishing Co. New York 1955 664 671
- Jackson J. L. et al “Flow Apparatus for Determination of Spontaneous Ignition Delays.” Indus. & Eng. Chem 46 12 December 1954 2547 50
- Schott G. L. Kinsey, J. L. “Kinetic Studies of Hydroxyl Radicals in Shock Waves. II. Induction Times in the H 2 - O 2 Reaction.” J. Chem. Phys. 29 5 November 1958 1117 82
- Momtchiloff I. N. et al “Kinetics in H 2 -Air Flow Systems I. Calculation of Ignition Delays for Hypersonic Ramjets.” Ninth Symposium (International) on Combustion Academic Press Inc. New York 1963 220 30
- Olson D. R. “Spontaneous Ignition Time of Mixtures of Heptane Vapor and Air.” Yale University 1951
- Bair, W. E. Olson, D. R. Lichty, L. C. “Spontaneous Ignition of N-Heptane Air Mixtures in a Steady Flow Process.” Indus. & Eng. Chem. 49 4 774 779
- Burwell W. G. “The Spontaneous Ignition Behavior of Iso-Octane Air Mixtures under Steady Flow Conditions.” Yale University 1962
- Rust F. F. Callamer, D. O. “The High Temperature Oxidations of 2,2,4 Dimethybutane.” J. Am. Chem. Soc 76 1954 1055 1058
- Benson S. W. “The Foundations of Chemical Kinetics.” McGraw-Hill Book Co. New York 1960 11 273 276
- Rice F. O. Herzfeld, K. F. J. Am. Chem. Soc. 56 1934 284
- Boord, C. E. Greenlee, K. W. Derfer, J. M. APIRP - 45 Technical Reports 12 3 1953
- Livengood J. C. Wu P. C. “Correlation of Autoignition Phenomena in Internal Combustion Engines and Rapid Compression Machines.” Fifth Symposium (International) on Combustion Reinhold Publishing Co. New York 1955 347 356
- Salooja. K. C. “Combustion and Flame.” 4 1960 117
- Rifkin E. B. Walcutt. C. SAE Transactions 65 1957 552
- Rust Collamer Jour. Amer. Chem. Soc. 76 1954 1055
- Pahnke Cohen Sturgis Ind. Eng. Chem 46 1954 1024