Numerical Analysis of NOx Formation Trends in Biodiesel Combustion using Dynamic ϕ-T Parametric Maps
Paper in proceeding, 2011

The use of biodiesel in conventional diesel engines results in increased NOx emissions; this presents a barrier to the widespread use of biodiesel. The origins of this phenomenon were investigated using the CFD KIVA3V code, which was modified to account for the physical properties of biodiesel and to incorporate semi-detailed mechanisms for its combustion and the formation of emissions. Parametric ϕ-T maps and 3D engine simulations were used to assess the impact of using oxygen-containing fuels on the rate of NO formation. It was found that using oxygen-containing fuels allows more O2 molecules to present in the engine cylinder during the combustion of biodiesel, and this may be the cause of the observed increase in NO emissions.


Junfeng Yang

Chalmers, Applied Mechanics, Combustion and Propulsion Systems

Valeri Golovitchev

Chalmers, Applied Mechanics, Combustion and Propulsion Systems

Paul Redon

Polytechnic University of Valencia (UPV)

J. Javier López

Polytechnic University of Valencia (UPV)

2011 JSAE/SAE International Powertrains, Fuels & Lubricants Meeting, Kyoto (Japan), Aug 29-Sep 2


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