3D model of viscous flutter of turbine rotor blades

In this study, numerical simulations of 3D viscous flutter were performed and compared with the available experimental results. The calculations were carried out for bending oscillations or the cascade known as the Eleventh Standard Configuration. The developed numerical algorithm solves 3D Reynolds-averaged Navier-Stokes equation together with the Baldwin-Lomax, using the explicit monotonous second-order accurate Godunov-Kolgan finite-volume scheme and moving hybrid H-O structured grid. Comparison of the calculated and experimental results for the Eleventh Standard Configurations has shown good quantitative and qualitative agreement for local performances (unsteady pressure amplitude and phase distribution) at off-design conditions. Benchmark solutions are provided for various values of the inter-blade phase angle O, 180, -90, 90, 72, -72 deg.