This paper presents a validation of numerical simulations in case of a forced oscillating hydrofoil. As a representative case study for vibrating blade in hydraulics machines, a 2D NACA 0009 oscillating hydrofoil is considered. Pressure coefficients from experiments and numerical simulations are presented. The fluid torque is then investigated in the frequency domain. A good agreement between experiments and numerical simulation is observed. This study is a first step for more thorough investigations in the fluid structure interaction field.