CFD Modeling of a DME CI Engine in Late-PCCI Operating Conditions 2023-01-0203
Predictive combustion models are useful tools towards the development of clean and efficient engines operating with alternative fuels. This work intends to validate two different combustion models on compression-ignition engines fueled with Dimethyl Ether. Both approaches give a detailed characterization of the combustion kinetics, but they substantially differ in how the interaction between fluid-dynamics and chemistry is treated. The first one is single-flamelet Representative Interactive Flamelet, which considers turbulence-kinetic interaction but cannot correctly describe the stabilization of the flame. The second, named Tabulated Well Mixed, correctly accounts for local flow and mixture conditions but does not consider interaction between turbulence and chemistry. An experimental campaign was carried out on a heavy-duty truck engine running on DME at a constant load considering trade-off of EGR and SOI. Simulations results of 10 operating conditions show that both models can be successfully employed to predict cylinder pressure, heat release rate and pollutant emissions.
Citation: Schirru, A., Hardy, G., Wright, Y., Lucchini, T. et al., "CFD Modeling of a DME CI Engine in Late-PCCI Operating Conditions," SAE Technical Paper 2023-01-0203, 2023, https://doi.org/10.4271/2023-01-0203. Download Citation
Author(s):
Andrea Schirru, Gilles Hardy, Yuri M. Wright, Tommaso Lucchini, Gianluca D'Errico, Patrik Soltic, Thomas Hilfiker
Affiliated:
Politecnico di Milano, Sursum-MI, Empa, Switzerland
Pages: 11
Event:
WCX SAE World Congress Experience
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Diesel / compression ignition engines
Engine efficiency
Dimethyl ether (DME)
Alternative fuels
Combustion and combustion processes
Heavy trucks
Engines
Engine cylinders
Exhaust gas recirculation (EGR)
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »