Disintegrating Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle 840275
The objective of this work is to study the fundamental knowledge for the disintegrating process and the characteristics of a diesel spray. Break-up length of a high speed jet in a pressurized vessel was measured by an electric resistance method. Spray angle and spray tip penetration were investigated photographically, A laser diffraction method was used for measuring the Sauter mean diameter.
The spray tip penetration is first proportional to a time, and after that, it is proportional to a root of the time from a beginning of an injection. The length in this first stage is considered to be equivalent to the break-up length of a fuel jet. The maximum spray angle is observed at a ratio of nozzle length to diameter being about 4. The spray angle decreases with increasing viscosity. The Sauter mean diameter gradually increases as the spray angle decreases.
Citation: Arai, M., Tabata, M., Hiroyasu, H., and Shimizu, M., "Disintegrating Process and Spray Characterization of Fuel Jet Injected by a Diesel Nozzle," SAE Technical Paper 840275, 1984, https://doi.org/10.4271/840275. Download Citation
M. Arai, M. Tabata, H. Hiroyasu, M. Shimizu
University of Hiroshima (Japan)
SAE International Congress and Exposition
SAE 1984 Transactions-V93-84
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