The trend towards downsizing, e.g. in internal combustion engines, leads to questions about heat losses, surface reactions and chemically reacting flows in boundary layers.
Flame-wall interactions (FWI) are becoming the focus of research.
Experimental and numerical investigation of FWI.
Mechanisms with a high number of species and reactions have been developed, which lead to time- and resource-consuming simulations.
Reduced models are needed in order to be able to carry out technically relevant simulations with an appropriate expenditure of time and resources.
Aim
Development of efficient but accurate reduced models for flames near walls that capture relevant phenomena such as side-wall quenching.
Improvement of the already developed reaction-diffusion manifolds (REDIMs) to better describe the formation of pollutants as well as the adaptation of the models for alternative fuels.
Methods
The REDIM method is a timescale-based model reduction concept with a particular focus on the coupling of transport and chemistry
Algorithm for hierarchical increase of REDIM dimensions
Strategies for Implementing REDIM Models in Large Eddy Simulations (LES)
Improving the reduced models by iteratively optimizing the gradient estimates using LES calculations
Outlook
Expansion of REDIMs for alternative fuels and flame retardants.
Focus on pollutant formation when developing reduced models
