Investigation of Unsteady Simulation Methods in an Oxyfuel Configuration

摘要

This paper presents a thorough investigation of different unsteady simulation methods as applied to a combustion chamber that is supposed to be used in an oxyfuel environment. The geometry of this configuration is quite complex as it consists of different, partly swirled inlet channels and a large variety of time and length scales. Here, the isothermal flow field is studied. Therefore, three different simulation methods (Unsteady RANS (URANS), Large Eddy Simulation (LES) and a hybrid URANS/LES method (Scale Adaptive Simulation, SAS)) are investigated. The LES are compared using two different codes by being based on the same submodels. The results are compared with each other qualitatively.