The effects of ethanol/gasoline blended fuel composed of gasoline with ethanol as additives in volume basis, on spray characteristics were experimentally investigated. Tests were carried out under various ambient pressure and fuel temperature. The results show that the spray would convert to superheated states by reducing the ambient pressure or increasing the fuel temperature. The influence of ambient pressure and fuel temperature on the macroscopic spray patterns become more significant with higher ethanol fraction fuels. At the end of the injection, the E85 spray penetration under the cold-jet condition is about 11% shorter than that with gasoline, and the E85 spray penetration under flash-boiling condition is about 20% longer than that with gasoline. The spray penetration rate increases and the total penetration extends obviously with higher injection pressure. Under the flash-boiling conditions, the spatial structure close to the injector tip presents a hollow cone structure, but the spatial structure far from the tip is obviously different for various fuels due to the different degree of flash-boiling collapse.
Experimental Study on Ethanol Gasoline Flash-Boiling Spray Characteristics Using Multi-hole GDI Injector
Lect. Notes Electrical Eng.
05.11.2020
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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