Applied Math Seminar Announcement

The focus of this research has been to increase the predictive capabilities of the general purpose computational fluid dynamics code Star-CD in the context of Diesel engines. The code solves the three-dimensional, Reynolds-Favre-averaged Navier-Stokes equations for turbulent flows together with a liquid spray model and various reaction models for combustion and emissions.

Additional models for combustion, soot emission and droplet break-up have been implemented into the Star-CD program by the author. Computations have been performed for three different diesel engines using these models in conjunction with different turbulence models and single and multi-step combustion chemistries. These simulations have been compared with experimental data. The results indicate that especially the turbulence model plays a major role in the simulation of Diesel combustion and emissions.

Acknowledgments:

This research has been sponsored by the Finnish national technology program Promotor. Promotor is supporting research projects in the engine industry in order to reduce emissions and increasing efficiency of Diesel engines.