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Planar Liquid and Gas Fuel and Droplet Size Visualization in a DI Diesel Engine
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English
Abstract
In an optically accessible direct injection Diesel engine with pressure and temperature conditions close to those of actual engines, the gaseous and liquid phases of the fuel were simultaneously visualized by planar exciplex fluorescence to yield instantaneous information sensitive to droplet breakup and vaporization in a non-combusting spray. Semi-quantitative results were extracted from the technique to give spatially integrated ensemble average data concerning the temporal evolution of the mass concentration of the respective phases. The ensemble scattering polarization ratio technique was also applied to yield the droplet size and concentration at the leading edge of the jet. Within the jet core, planar measurements of the depolarization of elastically scattered light indicated the presence of longitudinal fluctuations in droplet concentration. Cycle to cycle coherence in the depolarization profiles was observed.
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Citation
Hodges, J., Baritaud, T., and Heinze, T., "Planar Liquid and Gas Fuel and Droplet Size Visualization in a DI Diesel Engine," SAE Technical Paper 910726, 1991, https://doi.org/10.4271/910726.Also In
References
- Melton, L.A. Verdieck, J.F. “Vapor/Liquid Visualization for Fuel Sprays” Comb. Sci & Tech. 42 217 1985
- Melton, L.A. Verdieck J.F. “Vapor/Liquid Visualization in Fuel Sprays” 20th Symp. Intl. Comb. 1283 1984
- Bardsley, M.E.A. Felton, P.G. Bracco, F.V. “2-D Visualization of Liquid and Vapor Fuel in an I.C. Engine” SAE Paper 880521 1988
- Bardsley, M.E.A. Felton, P.G. Bracco, F.V. “2-D Visualization of a Hollow-Cone Spray in a Cup-in-Head, Ported I.C. Engine” SAE Paper 890315 1989
- Roosen, P. Knoche, K.F. “In-situ Measurement of Liquid and Evaporated Fuel in a Model Diesel Injection Spray” 23rd Symp. Intl. Comb. Orléans France The Combustion Insitute 1991
- Rotunno, A.A. Winter, M.A. Dobbs, G.M. Melton, L.A. “Direct Calibration Procedures for Exciplex-Based Vapor/Liquid Visualization of Fuel Sprays” Combust. Sci and Tech. 71 247 1990
- Melton, L.A. “Quantitative Use of Exiplex-Based Vapor/Liquid Visualization Systems (A Users Manual)” Final Report U.S.A.O, Contract DAAL-86-K-0082 Univ. Of Texas Dallas 1988
- Murray, A.M. Melton, L.A. “Fluorescence Methods for Determination of Temperature in Fuel Sprays” Appl. Op. 24 17 2783 1985
- Gossage, H.E. Melton, L.A. “Fluorescence thermometers using intramolecular exciplexes” Appl. Op. 26 11 2256 1987
- Hale, S.J. Melton L.A. “Absolute Quantum Yields for Exciplex Fluorescence” Appl. Spect. 44 1 101 1990
- Beretta, F. Cavaliere, A. D'Alessio, A. “Drop Size and Concentration in a Spray by Sideward Laser Light Scattering Measurements” Comb. Sci. & Tech. 36 19 1984
- Presser, C. Gupta, A.K. Semerjian, H.G. Santoro R.J. “Application of Laser Diagnostic Techniques for the Examination of Liquid Fuel Spray Structure” Chem. Eng. Comm. 90 75 102 1990
- Beretta, F. Cavaliere, A. D'Alessio, A. “Ensemble Laser Light Scattering Diagnostics for the Study of Fuel Sprays in Isothermal and Burning Conditions” 20th Symp. Intl. Comb. 1249 1984
- Cavaliere, A. Ragucci, R. D'Alessio, A. Noviello, C. “Analysis of Diesel Sprays through Two-Dimensional Laser Light Scattering” 22nd Symp. Intl. Comb. 1973 1988
- van de Hulst, H.C. Light Scattering by Small Particles Wiley New York 1950
- Kerker, M. The Scattering of Light and other Electromagnetic Radiation Academic Press 1969
- Bracco, F.V. “Modeling of Engine Sprays” SAE paper 850394 1985
- Pitcher, G. Wigley, G. “Velocity and Drop Size Measurements in Fuel Sprays in a Direct Injection Diesel Engine” Intl. Conf. On Mech. Two Phase Flows National Taiwan University Taipei, Taiwan June 12-15 1989