A fluid-structure interfacing technique for computational aeroelatic simulations
François Moyroud, N. Cosme, Markus Jöcker, David Lornage, Georges Jacquet‐Richardet · HAL (Le Centre pour la Communication Scientifique Directe) · 2000
This paper presents an approach to transfer information between a set of independently designed structural and aerodynamic grids. The approach combines a parent volume grid and child surface grid concept, a triangulation of the parent structural and aerodynamic surface grids at the fluid-structure interface, and a robust three-dimensional search and interpolation/extrapolation scheme for 3D unstructured triangular grids. The robustness, accuracy and general character of the present CFD/CSD interfacing methodology are demonstrated on four 3D test cases covering the fields of turbomachinery blading and rotordynamics, a highly twisted transonic fan, a transonic turbine rotor, a hydrodynamic wheel-casing element and a hydrodynamic bearing. The results show an excellent behaviour of the proposed technique to prolongate mode shapes, in particular in regions of the fluid-structure interface where CFD and CSD models have different requirements and sensibilities, e.g. blade leading and trailing edges.