This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Fuel Properties on Diesel Spray Characteristics
Annotation ability available
Sector:
Language:
English
Abstract
Several diesel injection systems were selected for evaluating the effects of fuel properties on diesel spray characteristics. Fuel properties that were examined were viscosity and specific gravity. The selected injection systems were operated on nine test fuels covering a broad range of viscosity and specific gravity. High-speed movies were taken of the fuels being injected into a high-pressure environment. Penetration and cone angle data were reduced from the movies and used as a basis for fuel-to-fuel comparisons. In addition, drop size distribution data were obtained for one injection system operating on four fuels with different viscosities.
Fuel viscosity was found to have an effect on spray tip penetration. For a pintle-type nozzle as fuel viscosity increased, the tip penetration rate decreased. Tip penetration rate from a pressure time injection system was proportional to the fuel viscosity, in that as viscosity increased, tip penetration increased. For a unit injector, viscosity effects on spray tip penetration were not significant. Viscosity effects for the unit injectors were more apparent from examination of the jet break-up length; as viscosity increased, the break-up length increased.
The cone angle of the spray did appear to be related to the fuel viscosity for all but one of the injection systems examined. For the pintle-type nozzle, the cone angle was not a function of fuel viscosity. For a unit injector, the cone angle tended to decrease with an increase in viscoity. The cone angle for the pressure-time injector appeared to decrease as viscosity increased. Drop size measurements made on the pintle nozzle indicated that as viscosity increased, the drop diameter also increased.
Recommended Content
| Technical Paper | Correlation of Physical and Chemical Ignition Delay to Cetane Number |
| Technical Paper | Diesel Engine Injection and Combustion of Slurries of Coal, Charcoal, and Coke in Diesel Fuel |
Authors
Citation
Callahan, T., Ryan, T., Dodge, L., and Schwalb, J., "Effects of Fuel Properties on Diesel Spray Characteristics," SAE Technical Paper 870533, 1987, https://doi.org/10.4271/870533.Also In
References
- Bracco, F.V. “Structure of High-Speed Sprays,” Contract DAAG29-81-K-0135 U.S. Army Research Office July 1981 June 1984 Final Technical Report February 1985
- Kono, S. Nagao, A. Motooka, H. “Prediction of in-Cylinder Flow and Spray Formation Effects on Combustion in Direct Injection Diesel Engines,” SAE Paper No. 850108 1985
- Singh, H. Singh, T. Henein, N.A. “A Mathematical Model for Spray Penetration in Direct Injection Diesel Engines,” ASME Paper No. 85-DGP-16 1985
- Hay, N. Jones, P.L. “Comparison of the Various Correlations for Spray Penetration,” SAE Paper No. 720776 1972
- Schweitzer, P.H. “Penetration of Oil Sprays,” Pennsylvania State College Bulletin No, 461 1937
- Wakuri, Y. Fujii, M. Amitani, T. Tsuneya, R. “Studies of the Penetration of a Fuel Spray in a Diesel Engine,” Bull. JSME 3 1960
- Dent, J.C. “A Basis for the Comparison of Various Experimental Methods for Studying Spray Penetration,” SAE Transactions 80 Paper No, 710571 1971
- Rife, J. Heywood, J.B. “Photographic and Performance Studies of Diesel Combustion With a Rapid Compression Machine,” SAE Paper No. 740948 1974
- Arai, M. Tabata, M. iroyasu, H. Shimizu, M. “Disintegrating Process and Spray Characterization of Fuel Jet injected by a Diesel Nozzle,” SAE Paper No. 840275 1984
- Harrington, D.L. “Analysis of Spray Penetration and Velocity Dissipation for Non-Steady Fuel injection,” ASME Paper 84-DGP-13 1984
- Edsell, J.D. “Comparison of Injected Behavior of Diesel and Sunflower Oil Using High-Speed Photography,” Report No. T66/85 Department of Mechanical Engineering, University of Melbourne Parkville, Victoria March 1985
- Ryan, T.W. III Dodge, L.G. “Diesel Engine injection and Combustion of Slurries of Coal, Charcoal, and Coke in Diesel Fuel,” SAE Paper 840119 1984