A classic textbook example of failure of large engineering structure is the Tacoma Narrows bridge disaster of 1940. An ultimate failure was related to self-excitation and resonance. The accident led researchers to rethink about the design approach. Although the present project has wide scope in mechanical engineering, the proposed research focuses on hydraulic turbines. Need for energy flexibility and interconnection with wind/solar energy have pushed hydro turbomachines to the limit. Turbines are subject to heavy resonance and forced excitation, which often results in ultimate (premature) failure. Then, the question is how to minimize the damage. Insofar, damping is determined a generic approach, engineering linear relation, based on damped natural frequency. However, boundary layer has essential role to create damping effect. For instance, when a structure reverberates, it dissipates kinetic energy to the fluid through boundary layer, i.e., fluid structure interface, and vice versa. This project aims to determine the damping effect that accounts boundary layer complexities. The project will carry out experimental and numerical investigations of boundary layer at a level of multi physics. Pressure, strain and velocity (PIV) measurements will be conducted on a turbine blade. The project aims to quantify the flow instability, mainly kinetic energy fluctuations, inside the boundary layer, and the role of fluid added damping. Three different test cases will be investigated: (1) circular blade cascade, (2) rotating disc and (3) planar flow on reverberating longitudinal plate.