TIME ACCURATE INCOMPRESSIBLE NAVIER-STOKES SIMULATION OF THE FLAPPING FOIL EXPERIMENT

A numerical simulation of an experiment conducted at Massachusetts Institute of Technology has been performed. The experiment was designed to study the flow about a two-dimensional hydrofoil undergoing high reduced frequency gust loading. The gust was created by two NACA 0025 hydrofoils oscillating sinusoidally in phase upstream of the stationary foil. Experimental data was taken in the flowfield near the stationary foil as well as on the foil on the entire experimental domain, including the multiblock unsteady incompressible Navier-Stokes algorithm based on artificial compressibility. A comparison of the pressures and velocities on the bounding box and surface of the stationary foil are presented for the steady case, as well as time histories and an harmonic analysis at the same locations for the unsteady case.