A Partitioned Strong Coupling Procedure for Simulation of Shock Wave/Flexible Structure Interaction

The prediction of FSI limit cycles involving transonic separated flows requires efficient and accurate solvers coupling techniques. Explicit partitioned strong coupling is considered in time domain, where careful attention should be paid to energy conservation at the fluid-structure interface. For all the presented results, both meshes are set up such that structural skin points and fluid boundary mesh points are collocated. The presented test case involves a shock tube in which the shock wave impinges on a cross flow flexible panel, initially at rest. Compared to experimental results, the pressure peaks and fluctuations are correctly predicted but the pressure level is over predicted as well as the displacement frequency. Results analysis explains correctly the flow physic which is shown to be weakly modified by structural damping, turbulence modeling and time discretization. This discrepancy between experimental and numerical results could been explained by the structure model, in which the panel root modeling might be questionable.