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Rapid Compression Machine Measurements of Ignition Delays for Primary Reference Fuels
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A rapid compression machine for chemical kinetic studies has been developed. The design objectives of the machine were to obtain: 1)uniform well-defined core gas; 2) laminar flow condition; 3) maximum ratio of cooling to compression time; 4) side wall vortex containment; and, 5) minimum mechanical vibration. A piston crevice volume was incorporated to achieve the side wall vortex containment. Tests with inert gases showed the post-compression pressure matched with the calculated laminar pressure indicating that the machine achieved these design objectives.
Measurements of ignition delays for homogeneous PRF/O2/N2/Ar mixture in the rapid compression machine have been made with five primary reference fuels (ON 100, 90, 75, 50, and 0) at an equivalence ratio of 1, a diluent (s)/oxygen ratio of 3.77, and two initial pressures of 500 Torr and 1000 Torr. Post-compression temperatures were varied by blending Ar and N2 in different ratios. It was found that the ignition delays were not a linear function of the ON of the fuel. Within the experimental range covered, the first-stage ignition delays decreased rapidly as the temperature increased, whereas the second-stage ignition delays stayed unchanged as the temperature increased. Comparison with existing data showed that the ignition delay measurements made in other RCM's should be carefully reevaluated partially due to their high heat transfer characteristics and partially due to their improper mixture preparation procedures.
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Park, P. and Keck, J., "Rapid Compression Machine Measurements of Ignition Delays for Primary Reference Fuels," SAE Technical Paper 900027, 1990, https://doi.org/10.4271/900027.Also In
References
- Hu, H. Keck, J. “Autoignition of Adiabatically Compressed Combustible Gas Mixture,” SAE 872110 1987
- Taylor, C.F. “The Internal Combustion Engine in Theory and Practice,” M. I. T. Press Cambridge, MA 1984
- Obert, E.F. “Internal Combustion Engines and Air Pollution,” Harper & Row Publishers New York 1973
- Lewis, B. von Elbe, G. “Combustion, Flames and Explosions of Gases,” Academic Press New York 1987
- Pollard, R.T. “Comprehensive Chemical Kinetics,” 17 Bamford C.H. Tipper C.F.H. Elsevier, Amsterdam 1977
- Taylor, C.F. Taylor, E.S. Livengood, J.C. Russell, W.A. Leary, W.A. “Ignition of Fuels by Rapid Compression,” SAE Quarterly Transaction 4 2 232 1950
- Halstead, M.P. Kirsh, L.J. Quinn, C.P. “The Autoignition of Hydrocarbon Fuels at High Temperatures and Pressures - Fitting of a Mathematical Model,” 30 45 1977
- Behrens, H. Lehr, H. Struth, W. Wecken, F. “Shock-Induced Combustion by High Speed Shots in Explosive Gas Mixtures,” Saint-Louis, France 1967
- Tabaczynski, R.J. Hoult, D.P. Keck, J.C. “High Reynolds Number Flow in a Moving Corner,” J. Fluid Mech. 42 249 1970
- Halstead, M.P. Kirsh, L.J. Prothero, A. Quinn, C.P. “A Mathematical Model for Hydrocarbon Autoignition at High Pressure,” Proc. Roy. Soc. 515 1975
- Reynolds, W.C. “Thermodynamic Properties in SI: Graphs, Tables and Computational Equations for 40 Substances,” Dept. of Mech. Eng. Stanford Univ. 1979
- Stull. D.R. Westrum, E.F. Sinke, G.C. “The Chemical Thermodynamics of Organic Compounds,” John Wiley & Sons, Inc. New York 1969
- Affleck, W.S. Thomas, A. “An Opposed Piston Rapid Compression Machine for Preflame Reaction Studies,” Proc. Inst. Mech. Engrs. 183 18 365 1969
- Keck, J.C. “Thermal Boundary Layer in a Gas Subject to a Time Dependent Pressure,” Letters in Heat and Mass Transfer 8 313 1981
- Lyford-Pike, E.J. “Measurement and Analysis of Thermal Boundary Layer Thickness in the Cylinder of a Spark Ignition Engine,” M.I.T. 1979
- American Petroleum Institute “Selected Values of Physical Properties of Hydrocarbons and Related Compounds,” 1953
- Westbrook, C.K. Warnatz, J. Pitz, W.J. “A Detailed Chemical Kinetic Reaction Mechanism for the Oxidation of Iso-octane and N-heptane over an Extended Temperature Range and Its Application to Analysis of Engine Knock,” 22th International Symposium of Combustion 1988
- von Rogener, H. 53 389 1949