Modeling advanced combustion modes in compression ignition engines with tabulated kinetics

Lucchini, Tommaso; Torre, Augusto Della; Onorati, Angelo

doi:10.1016/j.apenergy.2019.04.062

Cited by 25 publications

(15 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The computational approach for the simulation of dual fuel combustion is based on the one presented in [16] for pure diesel engines, where tabulated kinetics was employed to preserve accuracy and computational efficiency at the same time. Only the general steps in this combustion modeling procedure are repeated here, to ensure complete understanding of the methods presented on dual-fuel combustion modeling.…”

Section: Tabulated Kinetics For Diesel Combustionmentioning

confidence: 99%

“…Only the general steps in this combustion modeling procedure are repeated here, to ensure complete understanding of the methods presented on dual-fuel combustion modeling. For a more detailed description of the tabulated kinetics combustion modeling, one is referred to [16].…”

Section: Tabulated Kinetics For Diesel Combustionmentioning

confidence: 99%

“…The diesel engine operation, including detailed chemical information, can therefore be modeled [14][15][16].…”

Section: Twm Modelmentioning

confidence: 99%

“…The determined reaction rates and species concentrations are then stored in a table, which can be accessed during the CFD simulation. The correct values are retrieved and fed back into the numerical calculation depending on the thermo-chemical state of the system [14][15][16]. The most well-known method of characterizing the thermo-chemical state is the use of a progress variable, which tracks the evolution of the combustion process, combined with other parameters such as the scalar dissipation rate, unburned temperature, mixture fraction, ...…”

Section: Introductionmentioning

confidence: 99%

“…While both methods gave good predictions regarding combustion aspects such as ignition delay, flame lift-off length, ..., the computation time was significantly reduced by using the tabulated approach compared to direct integration. These tabulated kinetics have also been implemented into diesel engine simulations by Lucchini et al [14][15][16] and Maes et al [17] and their performance has been analyzed. A good prediction of the engine operation was retrieved with an accurate agreement between experimental and numerical pressure and heat release rate traces.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A novel technique for detailed and time-efficient combustion modeling of fumigated dual-fuel internal combustion engines

Decan

Lucchini

Verhelst

2020

Applied Thermal Engineering

View full text Add to dashboard Cite

The present work details a study of the 3D-modeling of dual-fuel engines, with a specific focus on medium speed marine engines. These operate under the fumigated approach, which means that the second fuel, which replaces most of the diesel fuel, is added in the intake duct. This type of engine requires the least amount of modifications to the current medium speed diesel engine and is therefore an ideal retrofit solution to tackle global warming and local air quality issues. In this work, the operation of such an engine has been modeled, with special care for the combustion modeling. Namely, it comprises both auto-ignition of the diesel pilot, and flame propagation in the premixed fuel-air mixture. A tabulated kinetics approach, currently being used to model diesel operation, has been extended to include this flame propagation. Both a Coherent Flame Model (CFM) and a Flame Surface Wrinkling Model (FSWM) have been implemented to handle this premixed combustion mode. Coupling a flame propagation model to the tabulated chemistry should provide a practical way of capturing both the complex dual-fuel combustion process as the chemistry information, while maintaining an acceptable computation time. Additionally, a tabulated laminar flame speed method has also been implemented. Experimental results were obtained on the operation of a medium-speed engine in diesel, natural gas/diesel dual-fuel and methanol/diesel dual-fuel mode, under varying operating loads and speeds. Results have been compared to the ones obtained from the simulations performed in OpenFOAM with the dedicated combustion modeling technique. It was found that while both FSWM and CFM capture some physical trends, they are currently not able of capturing the dual-fuel combustion process in total.Improvements with regards to the ignition and mixing-controlled combustion modeling are necessary, since the current approach is not able of fully capturing the dual-fuel phenomena. This work however provides insight in the complex combustion process and serves as a basis for further developments. It can also be used as an initial engine development tool for fast calculation and optimization of dual-fuel operation.

show abstract

Section: Tabulated Kinetics For Diesel Combustionmentioning

confidence: 99%

Section: Tabulated Kinetics For Diesel Combustionmentioning

confidence: 99%

“…The diesel engine operation, including detailed chemical information, can therefore be modeled [14][15][16].…”

Section: Twm Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%