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Comparative Study of Diesel Oil and Biodiesel Spray Combustion Based on Detailed Chemical Mechanisms

Junfeng Yang (Institutionen för tillämpad mekanik, Förbränning) ; Valeri Golovitchev (Institutionen för tillämpad mekanik, Förbränning) ; C. V. Naik ; E. Meeks
Journal of Engineering for Gas Turbines and Power-Transactions of the Asme (0742-4795). Vol. 136 (2014), 3,
[Artikel, refereegranskad vetenskaplig]

In the present work, a semidetailed combustion mechanism for biodiesel fuel was validated against the measured autoignition delay times and subsequently implemented in the FORTE CFD engine simulation package (Reaction Design Inc., 2010, "FORTE, FOR-UG-40102-1009-UG-1b," Reaction Design Inc., San Diego, CA) to investigate the spray characteristics (e. g., the liquid penetration and flame lift-off distances of rapeseed oil methyl ester (RME) fuel in a constant-volume combustion chamber). The modeling results were compared with the experimental data. Engine simulations were performed for a Volvo D12C heavy-duty diesel engine fueled by RME on a 72 deg sector mesh. Predictions were validated against measured in-cylinder parameters and exhaust emission concentrations. The semidetailed mechanism was shown to be an efficient and accurate representation of actual biodiesel combustion phases. Meanwhile, as a comparative study, the simulations based on a detailed diesel oil surrogate mechanism were performed for diesel oil under the same conditions.

Nyckelord: Reactive Flow Computations, Shock-Tube, Ignition, Kinetics



Denna post skapades 2014-02-13.
CPL Pubid: 193765

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Förbränning

Ämnesområden

Energiteknik

Chalmers infrastruktur