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Journal article
Combustion of N-butane and isobutane in an internal combustion engine: A comparison of experimental and modeling results
Symposium, International, on Combustion, v 23(1), pp 1047-1053
1991
Abstract
n-Butane and isobutane are used in a test engine to examine the importance of molecular structure in determining knock tendency. The experimental results are interpreted using a detailed chemical kinetic model. Temporally resolved samples were withdrawn from the combustion chamber, providing measured histories of the concentrations of a wide variety of reactant, olefin, carbonyl, and other intermediate and product species.
Calculations show that RO
2 isomerization reactions are more important contributors to chain branching in the oxidation of
n-butane than isobutane. Chain branching in isobutane oxidation is dependent on H-atom abstraction reactions involving HO
2 and CH
3O
2 radicals that occur at higher temperatures than RO
2 isomerization reactions. Therefore, an isobutane mixture must be raised to a higher temperature than a
n-butane mixture to achieve the same overall rate of reaction.
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21 citations in Scopus
Details
- Title
- Combustion of N-butane and isobutane in an internal combustion engine: A comparison of experimental and modeling results
- Creators
- R.D. Wilk - Union CollegeW.J. Pitz - Lawrence Livermore National LaboratoryC.K. Westbrook - Lawrence Livermore National LaboratoryS. Addagarla - Drexel UniversityD.L. Miller - Drexel UniversityN.P. Cernansky - Drexel UniversityR.M. Green - Sandia National Laboratories California
- Publication Details
- Symposium, International, on Combustion, v 23(1), pp 1047-1053
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]; Mechanical Engineering and Mechanics
- Scopus ID
- 2-s2.0-58149205762
- Other Identifier
- 991019173760004721