Modeling of Active Flow Control in an Aggressive Diffuser with Comparison to Experiment

This computational work explores active flow control for separation mitigation in an asymmetric, aggressive diffuser of rectangular cross-section at inlet Mach ∼ 0.4 and Re ∼ 1.3M. Unsteady tangential blowing is used to control separation on the single ramped face. Different methods of modeling the unsteady jet are evaluated, and the corresponding Spalart-Allmaras DDES and RANS simulations are compared to experimental PIV and pressure data.