Automated simulation of flapper and foil system

Numerical approach using the large-eddy simulation based on the compressible hydrodynamic equations is developed and employed in simulating on turbulent flow around a system of two flappers and a stationary foil. Similar conclusions concerning the mean flow profiles and turbulent intensity can be found in the simulation of flow around the flapper and foil system. Extensive studies are conducted on the effect of the unsteady outer flow, which is produced by the two upstream flappers, on the boundary layer of the stationary foil. As the unsteadiness in the outer flow is small, the response of the boundary of the stationary foil is mainly the first harmonic of the flappers´ oscillation. An interesting phenomenon of the tangential velocity phase shifting in the stationary foil´s boundary layer is observed.