In this article, we aim at providing results of fluid-structure interaction between water turbine blades and its mast. When the blade goes past the mast, a sudden pressure spike is recording, and the acceleration of the blade is recorded. Many results are provided, and two different structures are compared. At first, we validate our model against an experiment (Bahaj et al. [1]) as in [2]. This work is the direct continuation of [2] where many results of Computational Fluid Dynamics (CFD) were described. A methodology for estimating accurately the performance of a turbine for open water cases with CFD tools was outlined. The goal is now to validate those results for full cases (i.e. including the static parts) and including fluid-structure interaction effects. First, we validate the fluid only in dynamic mode. Then, several structures are setup by modifying the stiffness of the material and their behaviors are compared. We use K-FSI developed by K-Epsilon to solve the dynamic problem and the Quasi-Static Problem.