An experimental investigation on the longitudinal instability of a Wing-In-Surface-Effect-Ship on water surface and attempt of reproduction using numerical simulation

Wing-In-Surface-Effect-Ship (WISES) is expected to be a new vehicle for transportation. WISES is very similar to so called WIG but, for WISES, there is some effect from deformable surface of water. WISES utilize ground effect, so less fuel consumption comparing with conventional aircrafts will be expected. In this paper, about the canard type WISES, the self-propulsion test is carried out in a towing tank to confirm the presence of the instability phenomenon at planing condition with a model of canard-configuration WISES. At the same time, it was examined whether the experimental results can be reproduced by using the numerical simulation. The occurrence of the instability phenomena were able to be confirmed in the experiment and a similar tendency were seen in the numerical simulation.