Numerical Investigation of Flame Structure and Soot Formation in Biodiesel Spray Combustion
(2025) 2nd European Fluid Dynamics Conference — Location: Dublin, Ireland (26.August.2025)
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- Abstract
- We report on Large Eddy Simulations of spray combustion for Karanja Methyl Ester biodiese. Our numerical setup follows the Engine Combustion Network Spray A configuration, which is representative of of diesel engine operating conditions with exhaust gas recirculation. The gaseous phase is treated numerically in the Eulerian framework, while the droplet dynamics are resolved via Lagrangian Particle Tracking. A compact chemical kinetics mechanism is employed, featuring a surrogate fuel blend of n-dodecane and methyl butanoate, with the latter representing the ester content of biodiesel1). This mechanism is tabulated using the Flamelet Generated Manifold (FGM) methodology. Our FGM formulation incorporating 4 control variables: mixture fraction, progress variable, and their variances (whereas in previous work were only the variance of the mixture fraction was used. This approach ensures accurate yet computationally efficient turbulence-chemistry interaction modeling. Furthermore, the temperature is computed directly by solving the energy equation and is not retrieved from the database, as is typically the case in FGM methodologies.
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Ponet, A., & Papalexandris, M. (2025). Numerical Investigation of Flame Structure and Soot Formation in Biodiesel Spray Combustion. 2nd European Fluid Dynamics Conference, Dublin, Ireland. https://hdl.handle.net/2078.5/269570