Using AVL FIRE’s 3D CFD approach, engine performance as well as soot and NOx emissions are accurately calculated. This application note shows how Optimus orchestrates AVL FIRE simulations to explore the entire design space – providing deeper engineering insights and identifying designs that meet design specifications and constraints.

An automated, repeatable simulation process

The simulation workflow defined in AVL FIRE can easily be exported to Optimus. The engineer selects the input parameters and responses required for optimization from the parameter list defined in the AVL FIRE ESE DIESEL environment, and Optimus is ready for automated execution of the simulation workflow.

Speeding up design space exploration

Using Design of Experiments (DOE) techniques, Optimus screens the entire design space - identifying the most influential design parameters. The DOE data points are then used to fit a response surface model or surrogate model - this model serving as a much faster alternative to the more time-consuming 3D CFD simulations – allowing for optimization in seconds instead of days.

Delivering a better design

Optimus successfully reduced NOx emission by 24% while improving soot emission by 15% (delivering a favorable trade-off between both conflicting design objectives) - keeping engine performance at the original level.