The rotor BVI phenomenon is very complicated because of the different forms of interactions between blade and vortex. It occurs mainly when a helicopter is in descent or in maneuvering flight conditions. BVI causes pressure disturbance, which leads to noise and aeroelastic vibration. Pressure disturbance change the shock position such that deformation for blade occurs in position. In the present study, adaptive unstructured meshes are used to simulate BVI in time, and the aeroelastic response of a airfoil is studied for various flight conditions coupled with a 2-degree of freedom spring system.
