A numerical analysis of the emissions characteristics of biodiesel blended fuels

Journal Article · Fri Jan 01 04:00:00 EST 1999 · Journal of Engineering for Gas Turbines and Power

DOI:https://doi.org/10.1115/1.2816309· OSTI ID:346789

Choi, C Y; Reitz, R D ^[1]

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1. Univ. of Wisconsin, Madison, WI (United States). Engine Research Center

Computer simulations were conducted to study the combined effects of methyl soyate (biodiesel) blends with no. 2 diesel fuel on diesel engine (D.I.) performance. Diesel engine emissions and heat release rates were some of the parameters studied. The results from the computer simulations were compared against previously published results (Choi et al., 1997) from engine tests conducted on a single cylinder version of the Caterpillar 3400 series heavy duty diesel engine. The experiments and simulations were performed over a range of injection timings allowing particulate versus NO{sub x} trade-off curves to be generated. Phillips 66 certified no. 2 diesel fuel was used as the baseline; mixtures of 20% and 40% by volume of methyl soyate with the baseline no. 2 diesel fuel were used as the biodiesel blends. The multidimensional KIVA-II code (ERC version 2.4) was used to better understand the factors controlling the formation of NO{sub x} and soot. KIVA-II modeled the high load, single injection combustion of the baseline {number_sign}2 diesel fuel and the biodiesel blends. The code was changed to account for different fuel effects and the computational results were then compared against the experimental data. It is concluded that the increased NO{sub x} observed with the use of biodiesel fuels (in spite of their lower heats of combustion) is due to increased local temperatures as a result of enhance fuel/air mixing and increased spray penetration. The increased spray penetration results from the higher fuel viscosity of the biodiesel blended fuels which leads to reduced injection durations.

• Sponsoring Organization: Sandia National Labs., Albuquerque, NM (United States)
• OSTI ID: 346789
• Journal Information: Journal of Engineering for Gas Turbines and Power, Journal Name: Journal of Engineering for Gas Turbines and Power Journal Issue: 1 Vol. 121; ISSN JETPEZ; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AIR POLLUTION CONTROL
COMBUSTION KINETICS
COMBUSTION PRODUCTS
DIESEL FUELS
METHANOL FUELS
SOYBEAN OIL