Combustion and Emissions Modeling
- Steve Lottes -
Computational Fluid Dynamics Project Leader
- Tanju Sofu -
Simulation, Modeling, and Analysis Leader
Modern transportation engines are designed to use the available fuel resources efficiently
and minimize harmful emissions. Optimization of these designs is based on a wealth of practical design, construction and operating
experiences, and use of modern testing facilities and sophisticated analyses of the combustion and related processes. Analytical
and computational models for the combustion process require a detailed knowledge of the integrated response of fuel chemistry
and the combustion process, and fluid dynamics and heat transfer within the fuel, fuel sprays, and the engine structure, validated
against well-characterized experimental information.
Role of High-Performance Computing
Detailed models for fuel sprays and breakup, chemical reactions of the fuel constituents, fluid dynamics of the fuel mixture
in the combustion chamber, and heat transfer within the fuel and to the combustion chamber boundary have been developed. These
models often rely on first-principle models of the interacting phenomena, represented in a three-dimensional, time-dependent analysis
framework. Solution of the equations representing these complex and strongly interacting phenomena relies on use of sophisticated
engineering analysis software for describing the chemically reacting flow, and on large-scale computing resources for numerically
solving the coupled set of equations that describes the evolution of the system.
|Integrated computational fluid dynamics and computational chemistry can
be used for predicting and optimizing
performance of combustion systems.