Application of Aeroelastic Methods in Compressor Cascade Configurations Using Commercial Code Coupling

This paper presents the results of fluid structure coupled simulations of compressor blade vibrations of two compressor cascade configurations in order to determine aeroelastic parameters such as aerodynamic damping and the corresponding frequency shift. Therefore a partitioned code coupling approach was employed in order to couple the FE-code ABAQUS with the CFD-code FLUENT via MpCCI (Mesh based Code Coupling Interface) developed by Fraunhofer SCAI. The code coupling is used to compute the unsteady, two-dimensional, inviscid and viscid flow around a NACA 3506 airfoil for blade vibrations in a torsional modeshape. This first example is used to validate the results against results from literature. Further on the unsteady, two-dimensional, viscid flow around a research high-pressure compressor airfoil is computed for a bending mode. The results of those computations are implemented into a simplified, structural blisk model approximating the air flow influence by a mechanical model.