Fluid-Structure Interaction in Turbine Simulation

Abstract

In this article, two examples of fluid-structure interaction (FSI) are examined. Furthermore, the issues of turbulence and the impact of turbulence models on the accuracy of Karman vortices is evaluated. For this purpose, an adaptive turbulence model is described, introduced and validated. For the FSI simulations, a partitioned scheme is introduced and implemented. Since the main application considered here is hydraulic machinery, the issue of added mass effects and unstable coupling is addressed and discussed. The scheme is validated with a benchmark application established recently. Finally, the first results obtained for the FSI coupling of a tidal current turbine runner blade under fluid loads are described. For the simulations, the established in-house CFD-Code FENFLOSS is used. For the coupling, the commercial software MpCCI is applied. ABAQUS and CalculiX are used for the solution of the structural part. Simulations are performed on a cluster and a NEC SX-8 vector computer.