Solving harmonic linear problems in unsteady turbomachinery flows using a preconditioned GMRES solver

The linear harmonic approach has been applied for solving problems involving for example blade vibrations or unsteady blade row interaction effects in multistage axial compressors and turbines. The flow is decomposed into a time averaged flow and an unsteady flow perturbation which are governed by the Reynolds Averaged Navier Stokes (RANS) and...