Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
권호 표지

Simplified Reaction Scheme of Hydrocarbon Fuels and Its Application to Autoignition of Gasoline with Different Octane Numbers

탄화수소계 연료의 축소반응모델과 가솔린연료의 옥탄가 변화에 따른 자발화 지연시간

  • Published : 2003.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

Mathematically simplified reaction scheme that simulates autoignitions of the end gases in spark ignition engines has been studied computationally. The five equation model is described, to predict the essential features of hydrocarbon oxidation. This scheme has been calibrated against autoignition delay times measured in rapid compression machines. The rate constants, activation temperatures, Ta, Arrhenius preexponential constants, A, and heats of reaction for stoichiometric n-heptane/air, iso-octane/air, and their mixtures have all been optimised. The optimisation has been guided by Morley's correlation of the ratio of chain branching to linear termination rates with octane number. Comparisons between computed and experimental autoignition delay times have validated the Present simplified reaction scheme and the influences of octane number upon autoignition delay times have been computationally investigated. It has been found that both cool flame and high temperature direct reactions can have an effect on autoignition delay times.

Keywords

References

  1. Gas Temperature Measurement and Cyclic Dispersio of Knock in Spark Ignition Engine, 25th Symposium (Int.) on Combustion D. Bradley;G. T. Kalghatgi;C. Morley;P. Snowdon;J. Yeo
  2. Invited Lecture, Twenty-Fourth Symposium (Int.) on Combustion Resolution of Gas Phase and Surface Combustion Chemistry into Elementary Reactions J. Warnatz
  3. Combust. and Flame v.63 Chemical Kinetics of the High Pressure Oxidation of n-Butane and its Relation to Engine Knock W. J. Pitz;C. K. Westbrrok https://doi.org/10.1016/0010-2180(86)90115-X
  4. A Comprehensive Chemical Kinetic Reaction Mechanism for the Oxidation fo n-Butane and its Relation to Engine Knock, Twentieth Symposium(Int.) on Combustion, the Combustion Institute W. J. Pitz;C. K. Westbrook;W. M. Proscia;F. D. Dryer
  5. Combust. Sci. Tech. v.34 The Mechanism of High Temperature Combustion of Propane and Propene J. Warnatz https://doi.org/10.1080/00102208308923692
  6. J. Phys. Chem. v.69 On the Unification of the Thermal and Chain Theories of Explosion Limits B. F. Gray;C. H. Yang https://doi.org/10.1021/j100892a044
  7. Combust. and Flame v.30 The Autoignition of Hydrocarbon Fuels at High Temperatures and Pressures - Fitting of a Mathematical Model M. P. Halstead;L. J. kirsch;C. P. Quinn https://doi.org/10.1016/0010-2180(77)90050-5
  8. Combust. and Flame v.93 Kinetic Fundamentals of Alkane Autoignition at Low Temperatures J. F. Griffiths https://doi.org/10.1016/0010-2180(93)90092-H
  9. Transactino of KSAE v.9 no.4 Characteristics of the Ignition Delay for Hydroccarbon Fuels by Reduced Chemical Kinetics Modeling H. Kim;S. Bae;K. Min
  10. Ph. D. Thesis,Leeds Univerisity Autoignition in Gasoline Engines J. Yeo
  11. Transaction of KSAE v.10 no.1 Simplified Reaction Scheme of Hydrocarabon Fuels and its Application to Autoignition of n-Heptane J. Yeo
  12. The Phenomenology of Modeling Combustino Chemistry, Fossil Fuel Combustion F. D. Dryer
  13. Sixth Report, Gas/Surface Interatctions and Damaging Mechanism in Knocking Combustion, CEC Contract JOULE-0028D Collection of Global Reaction Kinetic Data for High C Fuels R. Minetii
  14. Combust. Sci. Tech. v.53 A Fundamentally based Correlation between Alkane Structure and Octane Number C. Morley
  15. Poster Presentation, Proceedings of Anglo-German Combustion Symposium Automatic Analysis of the Mechanism for the Autoignition of Alkanes and Ethers : Correlation with Octane Number C. Morley