10.18453/rosdok_id00000698 Kröger, Hannes Hannes Kröger http://d-nb.info/gnd/142212598 Universität Rostock 2010 530 Physics 620 Engineering & allied operations 2010 en http://purl.uni-rostock.de/rosdok/id00000698 urn:nbn:de:gbv:28-diss2010-0118-2 The work presents numerical investigations of flame propagation in a free straight vortex. The simulations rely on the LES technique and presumed-PDF combustion modeling with a chemical mechanism reduced by an ILDM approach which has been validated on a number of test cases. Numerical and experimental study confirm that the phenomenon of the Combustion Induced Vortex Breakdown (CIVB) can take place in an unconfined turbulent vortex with a strong inner axial flow. The LES analysis allowed to determine the main physical mechanisms of this phenomenon.