Dual Fuel Combustion Model for a Large Low-Speed 2-Stroke Engine Czech Technical University

Format:

Conference/Event

Author/Creator:

Cernik, Cernik, author.

Contributor:

Dahnz, Christoph

Hensel, Sebastian Wolfgang

Macek, Jan

Conference Name:

SAE 2016 World Congress and Exhibition (2016-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2016

Summary:

A quasi-dimensional dual fuel combustion model is proposed for a large 2-stroke marine engine. The introduced concept accounts for both diffusion combustion of the liquid pilot fuel and the flame front propagation throughout the gaseous premixed charge. For the pilot fuel case a common integral formulation defines the ignition delay whereas a time scale approach is incorporated for the combustion progress modeling. In order to capture spatial differences given by the scavenging process and the admission of the gaseous fuel, the cylinder volume is discretized into a number of zones. The laws of conservation are applied to calculate the thermodynamic conditions and the fuel concentration distribution. Subsequently, the ignition delay of the gaseous fuel-air mixture is determined by the use of tabulated kinetics and the ensuing oxidation is described by a flame velocity correlation. The development of particular sub-models is closely linked to corresponding 3D-CFD investigations whereas the resulting burn rates and pressure traces are validated against the experimental engine data. Furthermore, the model implementation into a commercial 1D simulation tool allows performing full cycle calculations and thus facilitates utilization for future engine development and optimization process

Notes:

Vendor supplied data

Publisher Number:

2016-01-0770

Access Restriction:

Restricted for use by site license