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Proposing Institution

TU Darmstadt, Fachgebiet Simulation reaktiver Thermo-Fluid Systeme
Project Manager

Wang Han
Otto-Berndt-Straße 3
64287 Darmstadt
The flamelet regime is one of the most important regimes for combustion processes. Many technical applications, like engines or gas turbines fall into that regime, where chemistry is fast and reactions occur in thin layers. The flamelet concept is one of the 5 paradigms in combustion and a number of combustion models are based on it. One central assumption in classical flamelet models for non-premixed combustion is that transport predominantly occurs along the gradient of mixture fraction (normal to the mixture fraction isosurface). Up to now curvature of the mixture fraction isosurface was regarded as a higher order effect and consequently neglected. Curvature in fact leads to tangential transport on the iso-scalar surface. Recently, investigations of laminar flames have shown that this assumption may not be valid in general for the flamelet model, and that curvature induced transport may not be neglected. During the course of this project we will investigate this fine scale effect by means of direct numerical simulations (DNS). Thereby, an in-situ flamelet tracking algorithm will be used to quantify the impact of external effects (scalar dissipation rate, curvature) onto the fully resolved reaction zone.

Impressum, Conny Wendler