This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Fuel-Air Ratios in a Spray, Determined between Injection and Autoignition by Pulsed Spontaneous Raman Spectroscopy
Annotation ability available
Sector:
Language:
English
Abstract
Quantitative, ensemble averaged, two dimensional maps of the fuel-air ratio in an injection jet were obtained through a series of single point Raman measurements. Pure n-heptane was injected with a commercial injection system into a special high pressure (45 bar) and high temperature (500 °C) observation chamber. The investigations were performed between injection and autoignition of the spray, and between 15 mm and 48 mm below the nozzle.
On the basis of nearly 100,000 single point measurements a computer film was produced showing that faster propagating fuel in the inner spray and at the spray tip plays an important role in mixture formation.
Authors
Topic
Citation
Heinze, T. and Schmidt, T., "Fuel-Air Ratios in a Spray, Determined between Injection and Autoignition by Pulsed Spontaneous Raman Spectroscopy," SAE Technical Paper 892102, 1989, https://doi.org/10.4271/892102.Also In
References
- Sitkei G. Kraftstoffaufbereitung und Verbrennung bei Dieselmotoren Springer-Verlag Berlin 1964
- Johns R.J.R. The effect of piston bowl offset on the compression-inducted air motion in Dl-Diesel engine combustion chambers-Proc. JSME Int. Symp. “Diagnostics and Modeling of Combustion in reciprocating engines” Tokio 1985
- See, e.g. Eckbreth A.C. Laser Diagnostics for Combustion Temperature and Species Abacus Press Cambridge, Mass 1988
- Radziemski R. et al. Laser Spectrocopy and its Applications, Optical Engineering 11 Marcel Dekker 1987
- Arcoumanis C Green H.G. Whitelaw J.H. The application of Laser-Rayleigh-Scattering to a reciprocating Model Engine, SAE 840376
- Dent J.C. Some diagnostic methods applied to air-fuel mixing processes in internal combustion engines and their phenomenoiogical modelling, Tokio Symp. “Diagnostics an Modeling of Combustion in reciprocating engines” 1985
- Heinze Th. Ramanspektroskopische Messungen der lokalen Stöchiometrie in einem Einspritzstrahl, PhD Thesis RWTH Aachen 1989
- Pischinger F. Reuter U. Scheid E. Self Ignition of Diesel Sprays and its Dependence on Fuel Properties and Injection Parameters, ASME 88-ICE-14 1988
- Scheid E. Reuter U. Erste Untersuchungen des Zundverhaltens bei Einsprit-zung in eine Druckkammer unter dieselmo-torischen Randbedingungen, SFB 224 Kolloquium 1985
- Ciezki H Adomeit G. Experimental Shock-Tube Investigation of the ignition Delay of n-Heptane/Op/N„/Ar- Mixtures under high Pressure, 16th Symp. on Shock Tubes and Waves Aachen 1987