HiFi-CFD for Turbomachinery Applications
The project "HiFi-CFD for Turbomachinery Applications" is a the combined effort of four research projects carried out at the Division of Fluid Dynamics/Department of Mechanics and Maritime Sciences/Chalmers University of Technology with focus on detailed simulations of turbomachinery flows and aeroacoustics. In all of these four research projects, high-fidelity Computational Fluid Dynamics (CFD) methods are used for the simulation of flows in engineering applications with the aim to gain understanding of the underlying physical principles and to push the limits for industrial use of CFD. The simulations are done using Large Eddy Simulation (LES) or a hybrid of LES and Unsteady Reynolds-Averaged Navier-Stokes (URANS). The large-scale simulations are done using computational grids with sizes in the order of 100 million cells. The interest for a move towards usage of more detailed CFD in an industrial context is driven by the integrated component design trend in the aero engine community. Integrated component design requires more detailed geometric representation to be able to account for component interaction effects. Furthermore, to be able to investigate interaction with secondary flow systems, fine scale flow details needs to be represented with high accuracy. Prediction of flow-induced noise (aeroacoustics) in turbomachinery applications where high-frequency acoustic waves needs to be resolved is another important driver towards the increased interest for high-fidelity CFD methods within the aero engine community.