- JSAE Powertrains, Fuels and Lubricants international meeting, in Kyoto, JAPAN, Sept. 1-4, 2015
presenting the paper: Battistoni M., Poggiani C., Som S., "Prediction of the nozzle flow and jet characteristics at start and end of injection: transient behaviors", SAE 2015-01-1850
- ECN4 Engine Combustion Network 4th Workshop, in Kyoto, JAPAN, Sept. 5-6, 2015
submissions of simulation results to 'Spray G Gasoline Direct-Injection' and 'Non-Reactive Diesel Spray' sessions
- SAE ICE2015 - 12th International Conference on Engines & Vehicles conference, in Capri island, ITALY, Sept. 13-17, 2015
chairing 'Fuel Injection and Sprays: Modeling' sessions
Background – The shape of fuel injection ramps affects spray penetration and mixing process, especially with short multiple injection strategies  as generally used in direct ingection engines. It has been shown that after an injection pulse fuel dribbles can be produced, and a significant amount of ambient gas is also ingested in the nozzle sac depending on factors like ambient back pressure, hole sizes, etc. [2,3]. The start of a new injection event is consequently affected by the presence of residual gas in the sac. During the first 100 µs after Start-of-Injection (aSOI) liquid penetration is shorter and evaporation rate is altered . This work reports investigations on diesel spray transients, accounting for internal nozzle flow and needle motion, carried out at Argonne National Laboratory (ANL) . LES of end-of-injection and start-of-injection processes have been carried out on a single hole injector, trying to link the phenomena and provide insights in to the physics.