Flutter characteristics of a pitch-plunge aeroelastic system subjected to external vortical disturbances

This paper systematically investigates the influence of a vortical wake coming from an upstream bluff-body on a pitch-plunge aeroelastic system’s response dynamics compared to those obtained for uniform flow conditions. To the end, the flow-induced vibration of a two degrees-of-freedom airfoil section in the wake of a bluff body is simulated through a partitioned strong coupling approach using an in-house python-based coupling interface - CUPyDO. The flow and the structural counterparts are modeled using the open-source library SU2 and an in-house rigid body motion solver NativeSolids, respectively. The primary focus is to study the effect of the oscillating induced velocity field due to periodic vortex shedding behind the upstream bluff body on the flutter characteristics of the aeroelastic system. The underlying wake-structure interactions will also be studied in detail.