Development of accurate fluid-structure interaction models for aerospace problems

Abstract. The research program deals with fluid-structure interaction (FSI), a challenging field of engineering, practical application on aerospace problems such as the flutter, an instability problem due to aeroelastic excitations. goal is find suitable way deal flutter in two macro fields, fluid and structure, are modelled mid high-level accuracy. Moreover, creation interface could be useful study other problems, cabin comfort for aircraft. To do that, activity firstly split depth structural problem, then they merged together through analysis: main that each has own scale union both requests modelling analysis. After preliminary state art literature, which forms pillar project, analysed first. structure system carried out Carrera Unified Formulation (CUF), allows reduced degrees freedom model same accuracy classical Finite Element Method (FEM). Analysis possible adaptive mesh methods needed order match proper at dynamics system. This work milestone future investigation need refinement, beyond field. Then, studied Navier-Stokes equations. In particular, Dual Time Stepping non-stationary Favre Average used. More general, considering different magnitude Reynold’s number, three analysis done: Reynolds (RANS) only large-scale eddies resolved components modelled, Large Eddy Simulation (LES) adds resolution flux energy respect previous simulation Direct Numerical (DNS) resolves also dissipating eddies, so representing best performing but very high computational cost. Finally, complete performed velocity induced vibrations from turbulent boundary layer aircraft and/or rocket nose.