Dipartimento d'Ingegneria

Friday, 11 September 2015 11:24

research focus on fuel and combustion

September 2015, traveling for conferences... Good times, attending

- 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

Published in Research

Background –  The shape of fuel injection ramps affects spray penetration and mixing process, especially with short multiple injection strategies [1] 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 [1]. This work reports investigations on diesel spray transients, accounting for internal nozzle flow and needle motion, carried out at Argonne National Laboratory (ANL) [8]. 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.
Battistoni-Xue-Som - les4ice abstract spray-transients v42-

Published in Research


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