This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Raman Spectroscopy and Flow Visualization Study of Stratified Charge Engine Combustion
Annotation ability available
Sector:
Language:
English
Abstract
Transient, precombustion fuel/air ratios at the spark plug electrode gap in a DISC engine have been measured using cw laser Raman spectroscopy and have been correlated with mixture ignitability measurements. From these measurements, it was found that with decreasing quantities of injected fuel there was a general trend towards decreased peak equivalence ratio, a delay in fuel arrival at the spark electrode gap, and a narrowing of the crank angle duration over which mixture ignition was possible. Lean inflammability limits determined from the ignition study suggested a dual-ignition mechanism which depended on the rate of change of equivalence ratio with crank angle. Flow visualization of the stratified charge combustion revealed substantial differences in mixture burn characteristics and combustion duration as the ignition crank angle was varied. Quenching of the burning mixture was observed and its occurrence was correlated with the Raman measurements.
Authors
Citation
Johnston, S., "Raman Spectroscopy and Flow Visualization Study of Stratified Charge Engine Combustion," SAE Technical Paper 800136, 1980, https://doi.org/10.4271/800136.Also In
References
- Johnston S. C. “Precombustion Fuel/Air Distribution in a Stratified Charge Engine Using Laser Raman Spectroscopy,” SAE Paper 790433 February 1979
- Johnston S. C. Robinson C. W. Rorke W. S. Smith J. R. witze P. O. “Application of Laser Diagnostics to an Injected Engine,” SAE Paper No. 790092 February 1979
- Hattori, T. Goto, K. Ohigashi, S. “Study of Spark Ignition in Flowing Lean Mixtures,” Paper C101/79, I Mech E 1979
- Dyer T. M. “Charaterization of One- and Two-Dimensional Homogeneous Combustion Phenomena in a Constant Volume Bomb,” December 1978
- Ballal D. R. Lefebvre, A. H. “The Influence of Spark Discharge Charateristics on Minimum Ignition Energy in Flowing Gases,” Combustion and Flame 24 99 108 1975
- Dyer T. M. Witze P. O. “Laser Velocimeter Measurements in a Constant Volume Internal Combustion Engine Simulator,” Laser Velocimetry and Particle Sizing Thompson H. D. Stevenson W. H. Hemisphere Publishing Corporation 1978
- Edse R. Strauss W. A. “Research on Combustion Phenomena at High Pressures,” The Ohio State University Research Foundation Columbus Ohio February 1961
- Hardesty D. R. Weinberg, F. J. “Burners Producing Large Excess Enthalpies,” Combustion Science and Technology 1974 8 201 214
- McCroskey, W. J. “Some Current Research in Unsteady Fluid Dynamics - the 1976 Freeman Scholar Lecture,” Transactions of the ASME, Journal of Fluids Engineering March 1977
- Rassweiler G. M. Withrow, L. “Motion Pictures of Engine Flames Correlated with Pressure Cards,” Transactions of the SAE 42 1938
- Lewis Von Elbe “Combustion, Flames and Explosions of Gases,” Second Edition Academic press Inc. 1961
- Young M. B. Lienesch J. H. “An Engine Diagnostic Package (EDPAC) - Software for Analyzing Cylinder Pressure-Time Data,” General Motors Research Laboratories November 1978