Development and Validation of SI Combustion Models for Natural-Gas Heavy-Duty Engines Politecnico di Milano

Format:

Book

Conference/Event

Author/Creator:

Sforza, Lorenzo, author.

Contributor:

D'Errico, Gianluca

Gianetti, Giovanni

Lucchini, Tommaso

Conference Name:

14th International Conference on Engines & Vehicles (2019-09-15 : Capri, Italy)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2019

Summary:

Flexible, reliable and consistent combustion models are necessary for the improvement of the next generation spark-ignition engines. Different approaches have been proposed and widely applied in the past. However, the complexity of the process involving ignition, laminar flame propagation and transition to turbulent combustion need further investigations. Purpose of this paper is to compare two different approaches describing turbulent flame propagation. The first is the one-equation flame wrinkling model by Weller, while the second is the Coherent Flamelet Model (CFM). Ignition is described by a simplified deposition model while the correlation from Herweg and Maly is used for the transition from the laminar to turbulent flame propagation. Validation of the proposed models was performed with experimental data of a natural-gas, heavy duty engine running at different operating conditions. To deeply analyze main differences between Weller and CFM models, a detailed comparison of computed and experimental data was performed in terms of cylinder pressure, heat release rate, wall heat transfer, distribution of progress variable and flame surface density

Notes:

Vendor supplied data

Publisher Number:

2019-24-0096

Access Restriction:

Restricted for use by site license