SMTP23 Conference (Formerly known as The Working Process of the Internal Combustion Engine)
Ammonia-diesel dual-fuel combustion simulation using a tabulated chemistry approach
Authors
Dominik KRNAC1, Bhuvaneswaran MANICKAM1, Peter HOLAND1, Valentin SCHARL2, Thomas SATTELMAYER2
1MAN Energy Solutions SE , 2Technical University of Munich
Summary
A numerical simulation approach to predict the pilot Diesel ignited ammonia (NH3) combustion using tabulated chemistry is presented in this publication. The experimental setup of an RCEM (Rapid-Compression-Expansion-Machine) has been considered for the simulation and its experimental data is used for validation. Spray characteristics, evaporation and thereby fuel air mixing due to air entrainment should be modelled and predicted accurately to determine the appropriate combustion characteristics. Therefore, Diesel and ammonia sprays are simulated and validated for a wide range of combustion chamber pressures and temperatures as a first step. Afterwards, combustion simulations have been conducted using the ECFM-3Z and ECFM-CLEH models. In general, the combustion of the Diesel pilot is in very good agreement with experimental data. When using the ECFM-3Z model, ammonia combustion occurs much faster than expected. The ECFM-CLEH model predicts a more delayed ammonia combustion, which is in better agreement with the measurements.
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