This thesis discusses the efficient numerical modeling of self-excited thermoacoustic oscillations. On the one hand two different types of hybrid CFD/low-order models are investigated. These models resolve the flame with reactive flow simulations. The acoustic field is modeled via a coupled acoustic low-order model. On the other hand, a methodology which allows to deduce nonlinear low-order models from a transient CFD simulation is investigated. The results of the different approaches are compared.     «

This thesis discusses the efficient numerical modeling of self-excited thermoacoustic oscillations. On the one hand two different types of hybrid CFD/low-order models are investigated. These models resolve the flame with reactive flow simulations. The acoustic field is modeled via a coupled acoustic low-order model. On the other hand, a methodology which allows to deduce nonlinear low-order models from a transient CFD simulation is investigated. The results of the different approaches are compar...     »