09/11/2011: Combustion modeling in technical applications
Combustion Modeling in Technical Applications
November 9, 2011, 16:00-17:00, ML J 25/26, ETH Zurich
Prof. Dr.-Ing. Heinz Pitsch
Institut für Technische Verbrennung, RWTH Aachen University, Germany
Modeling combustion in technical combustion devices is challenging, because of the multi-scale character, complex geometry, flow, and mixing, and the multitude of different interacting processes, including turbulence, chemistry, spray formation, spray dynamics and evaporation, radiation, and pollutant formation. Here, using the example of aircraft engine combustors, we will first assess the importance of different combustion regimes for the application. Based on this knowledge, suitable combustion models will be developed. The application in simulations of novel combustor design concepts shows that for liquid fuel combustion, small details in the spray models have a leading order influence. Finally, the application of the combustion models in predictions of nitrogen oxide emissions from aircraft engines and its interaction with radiation will be discussed.