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Simultaneous Analysis of Light Absorption and Emission in Preflame Reactions under Knocking Operation
Technical Paper
2000-01-1416
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The study deals with the light absorption and emission behavior in the preflame reaction interval before hot flame reactions.(1-3) Absorption spectroscopy was used to measure the behavior of HCHO and OH radicals during a progression from normal combustion to knocking operation. Emission spectroscopic measurements were obtained in the same way that radical added HCO. Radical behavior in preflame reactions was thus examined on the basis of simultaneous measurements, which combined each absorption wavelength with three emission wavelength by using a monochromator and a newly developed polychromator.(4-5)
When n-heptane (0 RON) and blended fuel (50 RON) were used as test fuel, it was observed that radical behavior differed between normal combustion and knocking operation and a duration of the preflame reaction was shorter during the progression from normal combustion to a condition of knocking.
The measurements obtained for HCHO when n-heptane was used as the test fuel showed an increase in emission intensity in the early period of the preflame reactions under normal combustion, followed by a decline in intensity. Under a condition of knock induced by an overheated cylinder head, it was observed the maximum emission intensity decreased. These tendencies are thought to correspond to the passage and degeneracy of a cool flame.
As blended fuel (50 RON) was test fuel, the measurements obtained that behavior thought to indicate the passage of a cool flame, but the characteristics associated with the degeneracy of a cool flame were not observed. Moreover a result was found that the behavior of HCO is more important factor in the mechanism causing knock than the behavior of HCHO.
Authors
Citation
Ogawa, J., Akimune, K., Komuro, K., Yoshida, K. et al., "Simultaneous Analysis of Light Absorption and Emission in Preflame Reactions under Knocking Operation," SAE Technical Paper 2000-01-1416, 2000, https://doi.org/10.4271/2000-01-1416.Also In
References
- Shoji, H. Saima, A. Shiino, K. Ikeda, S. “Clarification of Abnormal Combustion in a Spark Ignition Engine” SAE Paper 922369 1992
- Shoji, H. Saima, A. Shiino, K. “Simultaneous Measurement of Light Emission and Absorption Behavior of Unburned Gas During Knocking Operation” SAE Paper 932754 1993
- Shoji, H. Tosaka, Y. Yoshida, K. Saima, A. “Radical Behavior in Preflame reactions Under Knocking Operation in a Spark Ignition Engine” SAE Paper 942061 1994
- Shoji, H. Saima, A. Sasao, T. “The Behavior of Radical Luminescence Intensity in a Spark Ignition Engine” JSAE Review 13 1 14 19 1992
- Shoji, H. Saima, A. Sasao, T. “Clarification of the Combustion Reaction Mechanism in a Spark Ignition Engine by Spectroscopic Analysis” JSAE Review 13 2 4 9 1992
- Livengood, J.C. Taylor, C.F. Wu, P.C. “Correlation of Autoignition Phenomena in Internal Combustion Machines and Rapid Compression Machines” 5 th Symposium (International) on Combustion 347 356 1954
- Green, R.M. Cernansky, N.P Pitz, W.J. Westbook, C.K. “The Role of Low Temperature Chemistry in Autoignition of N-Butane” SAE Paper 872108 1987
- Kono, M, S. Kumagai, S. lnuma K. “Thermodynamic and Experimental Determinations of Knocking Intensity by Using a Spark Ignited Rapid Compression Machine, ” Combustion and Flame 54 33 47 1983
- Nakagawa, Y. et al. “Laser Shadowgraphy Analysis of Knocking,” Transactions of JSAE Review 28 43 49 1984
- Takagi, Y. Itou, T. Iijima, T. “An Analytical Study on Knocking Heat Release and its Control in a Spark Ignition Engine” SAE Paper 880196 1998
- Nakada, T. Itou, T. Takagi, Y. “Unburnt Gas Temperature Measurement Using Single Shot CARS in a Spark Ignition Engine” 393 1990
- Ramesh, B. Poola. Bhasker, T. Nagakngam, B. Gopalakrishnan, K. V. “The Influence of High-Octane Fuel Blends on the Performance of a Two-Stroke SI Engine with Knock-Limited-Compression Ratio” SAE Paper 941863 1994
- Pan, J. Sheppard, C. G. W. Tindall A. Berzins, M. Pennington S. V. Ware, J. M. “End Gas Inhomogeneity, Autoignition and Knock” SAE Paper 982616 1998
- Grandin Borje Angstrom Hans-Erik Stalhammar Per Olofsson Eric “Knock Suppression in a Turbocharged SI Engine by Using Cooled EGR” SAE Paper 982476 1998
- Leppard, W. R. “The Autoignition Chemistry of Isobutane: A motored Engine Study” SAE Paper 881606 1988
- Leppard, W. R. “The Autoignition Chemistries of Primary Reference Fuels, Other Mixtures and Blending Octane Numbers” SAE Paper 922325 1992
- Shoji, H. Shimizu, T. Yoshida, K. Saima, A. “Spectroscopic Measurement of Radical Behavior Under Knocking Operation” SAE Paper 952407 1995
- Shoji, H. Shimizu, T. Saima, A. “Spectroscopic Measurement of Radical Behavior Under Knocking Operation” SAE Paper 962104 1996
- Ota, Y. Komuro, K. Matsushima, T. Yoshida, K. Shoji, H. Saima, A. “ANALYSIS OF RADICAL BEHAVIOR UNDER KNOCKING OPERATION IN A SPARK IGNITION ENGINE” Proceeding of the 5 th ASME/JSME Joint Thermal Engineering Conference AJTE99-6328 1999
- Shoji H. Shiino K. Watanabe, H. “Simultaneous measurement of light absorption and emission of end gas during the knocking operation” JSAE Review 15 2 109 116 1994
- Tosaka, Y. Shoji, H. Saima, A. “A study of the influence of intermediate combustion products on knocking” JSAE Review 19 3 223 238 1995
- Gaydon, A. G. “The Spectroscopy of flames,” Chapman and Hall Ltd. London 1957
- Benson, S. W. Oxidation Communications2 169 188 1982 Elsevier
- Sokolik, A. S. “Self-Ignition Flame and Detonation in Gases” 1963 Israel Program for Scientific Transrations 60
- Ohta Y. et al. “Onset Behavior of Low-Temperature Autoignition Caused by Piston Compression” The 9th Internal Combustion Engine Symposium Japan
- Kojima, S. “Autoignition and Modeling of Gas Fuel and application. Combustion Research” 114 33 42 1998