Reacting Flows
Universität Stuttgart
Institut für Verbrennungstechnik der Luft- und Raumfahrt
High order numerical simulations of rocket combustors are performed. Beside a good treatment of fluid mechanics by Large Eddy Simulation (LES), focus is on a good prediction of turbulent combustion and turbulence chemistry interaction. In order to limit the tremendous grid point requirement of LES, a hybrid RANS/LES technique (DES of Durbin, a new development) is used. For turbulence chemistry interaction a multi-variate assumed PDF approach is employed. One aim is to improve the hybrid RANS/LES method that the grey-area problem is mitigated. With increasing orbital launch attempts in the last few years and the further growing industry of space tourism, more and more attention is drawn to the emissions of rocket engines. One important aspect is the prediction of soot formation that occurs in the combustion of hydrocarbons. Due to the complexity, this has been rarely studied numerically until today. Thus, soot formation in rocket combustion chambers will be investigated.