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Effect of Fuel-Air Mixture Stressing on Preignition Heat Release in a Knock Research Engine
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English
Abstract
Experiments were conducted in a modified single cylinder research engine to study the correlation between heat release and knock. A skip-fire strategy was used to isolate the heat release due to chemical preignition reactions from the exothermicity from the propagating flame front. n-Butane, isobutane and mixtures of these two were used as the fuels in the study. Pressure profiles of n-butane and isobutane mixtures indicate that there is a decrease in the heat release occurring during the second skip cycle, upon increasing the percentage of isobutane in the mixture. Analysis of chemical species indicate that there are two competing chemical pathways occurring during the heat release. The role that these chemical pathways play during autoignition is discussed.
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Addagarla, S., Henig, Y., Wilk, R., Miller, D. et al., "Effect of Fuel-Air Mixture Stressing on Preignition Heat Release in a Knock Research Engine," SAE Technical Paper 892082, 1989, https://doi.org/10.4271/892082.Also In
References
- Agnew W. G. “Room at the Piston Top: Contributions of Combustion Science to Engine Design,” Twentieth Symp, (Int'l. ) Combustion , The Combustion Institute Pittsburgh 1 1984
- Affleck W. S. Fish A. “Knock: Flame Acceleration or Spontaneous Ignition,” Combust. Flame 12 243 1968
- Smith J. R. Green R. M. Westbrook C. K. Pitz W. J. “Experimental and Modeling Study of Engine Knock,” Twentieth Symp, (Int'l,) Combustion , The Combustion Institute Pittsburgh 9 1984
- Najt P. M. “Evaluating Threshold Knock with a Semi-Empirical Model-Initial Results,” SAE Paper No. 872149 1987
- Downs D. Walsh A. D. Wheeler R. W. “A Study of Reactions that Lead to Knock in the Spark Ignition Engine,” phil. Trans. of the Royal Society London, A243 462 1951
- Downs D. Street J. C. Wheeler R. W. “Cool Flame Formation in a Motored Engine,” Fuel 32 279 1953
- Walcutt C. Mason J. M. Rifkin E. B. “Effect of Preflame Oxidation Reactions on Engine Knock,” Ind. and Eng. Chem 46 529 1954
- Pahnke A. J. Cohen P. M. Sturgis B. M. “Preflame Oxidation of Hydrocarbons in a Motored Engine,” Ind. and Eng. Chem 46 1024 1954
- Pipenberg K. J. Pahnke A. J. “Speqtrometric Investigations of n-Heptane Preflame Reactions in a Motored Engine,” Ind. and Eng. Chem 49 2067 1957
- Halstead M. P. Kirsch L. J. Prothero A. Quinn C. P. “A Mathematical Model for Hydrocarbon Autoignition at High Pressures,” Proc. Royal Soc. London, A346 515 1975
- Halstead M. P. Kirsch L. J. Quinn C. P. “The Autoignition of Hydrocarbon Fuels at High Temperatures and Pressures-Fitting of a Mathematical Model,” Combust. Flame 30 45 1977
- Hu H. Keck J. “Autoignition of Adiabatically Compressed Combustible Gas Mixtures,” SAE Paper No. 872110 1987
- Westbrook C. K. Dryer F. L. “Chemical Kinetic Modeling of Hydrocarbon Combustion,” Prog. Energy Comb. Sci. 10 1 1984
- Westbrook C. K. Pitz W. J. “A Comprehensive Chemical Kinetic Reaction Mechanism for Oxidation and Pyrolysis of Propane and Propene,” Comb. Sci. Tech 37 117 1984
- Pitz W. J. Westbrook C. K. Proscia W. M. Dryer F. L. “A Comprehensive Chemical Kinetic Reaction Mechanism for the Oxidation of n-Butane,” Twentieth Symp. (Int’l. ) Combustion , The Combustion Institute Pittsburgh 831 1984
- Pitz W. J. Westbrook C. K. “Chemical Kinetics of the High Pressure Oxidation of n-Butane and Its Relation to Engine Knock,” Combust. Flame 63 113 1986
- Kaiser E. W. Westbrook C. K. Pitz W. J. “Acetaldehyde Oxidation in the Negative Temperature Coefficient Regime: Experimental and Modeling Results,” Int. J. Chem. Kin. 18 655 1986
- Wilk R. D. Cernansky N. P. Pitz W. J. Westbrook C. K. “Propene Oxidation at Low and Intermediate Temperatures: A Detailed Chemical Kinetic Study,” Combust. Flame 77 145 1989
- Pitz W. J. Wilk R. D. Westbrook C. K. Cernansky N. P. “The Oxidation of n-Butane at Low and Intermediate Temperatures: An Experimental and Modeling Study,” paper no. WSSCI 88-51, presented at the Spring Meeting of the Western States Section/The Combustion Institute Salt Lake City 21 22 March 1988
- Leppard W. R. “A Detailed Chemical Kinetics Simulation of Engine Knock,” Comb. Sci. Tech. 43 1 1985
- Pitz W. J. Leppard W. R. Westbrook C. K. “Autoignition Chemistry of n-Butane in a Motored Engine: A Comparison of Experimental and Modeling Results,” SAE Paper No. 881605 1988
- Cernansky N. P. Green R. M. Pitz W. J. Westbrook C. K. “Chemistry of Fuel Oxidation Preceding End Gas Autoignition,” Comb. Sci. Tech 50 3 1986
- Green R. M. Cernansky N. P. Pitz W. J. Westbrook C. K. “The Role of Low Temperature Chemistry in the Autoignition of n-Butane,” SAE Paper No. 872108 1987
- Green R. M. Parker C.D. Pitz W. J. Westbrook C. K. “The Autoignition of Isobutane in a Knocking Spark Ignition Engine,” SAE Paper No. 870169 1987
- Rifkin E. B. Walcutt C. Betker G. W. “Early Combustion Reactions in Engine Operation,” SAE Quarterly Trans. 6 3 July 1952
- Cornelius W. Caplan J. D. “Some Effects of Fuel Structure, Tetraethyl Lead, and Engine Deposits on Preignition Reactions in a Firing Engine,” SAE Quarterly Trans. 6 3 July 1952
- Leppard W. R. “The Autoignition Chemistry of n-Butane: An Experimental Study,” SAE Paper No. 872150 1987
- Leppard W. R. “The Autoignition Chemistry of Isobutane: A Motored-Engine Study,” SAE Paper No. 881606 1988
- Henig Y. Addagarla S. Miller D. L. Wilk R. D. Cernansky N. P. ”Autoignition of n-Butane/Isobutane Blends in a Knock Research Engine,” SAE Paper No. 890157 1989
- obert E. F. Internal Combustion Engines and Air Pollution Harper and Row New York 1973
- Ferguson C. R. Green R. M. Lucht R. P. “Unburned Gas Temperatures in an Internal Combustion Engine: II. Heat Release Computations, “” Comb. Sci. Tech 5 63 1987
- Baker R. R. Baldwin R. R. Walker R. W. “Addition of n-Butane to Slowly Reacting Mixtures of Hydrogen and Oxygen at 480 C: Part 1. -Formation of Hydrocarbon Products” J. C. S. Faraday I 71 736 755 1975
- Wilk R. D. Cernansky N. P. Cohen R. S. “Transition in the Oxidation Chemistry of n-Butane from Low to Intermediate Temperatures,” paper No. WSSCI 85-31, presented at the Fall Meeting of the Western States Section/The Combustion Institute, Davis CA 21 22 October 1985