Wave scattering by a submerged plate in presence of a steady uniform current

The purpose of this experimental work was the study of the influence of a homogeneous current in the incident surface wave direction on the wave-reflecting power of a submerged plate. Results concerning reflection versus the wave period (in a fixed frame) for various amplitudes have shown a weak influence of the current both on the location of maxima and minima and on their amplitude. The locations of the maximum reflected energy are then weakly modified by the current contrary to the energy that is decreased. Moreover, reflections measured either for various amplitudes at given frequency or for bichromatic waves show a wave behaviour correctly described by a linear approach.