Abstract
Numerical simulations are performed using a deformation grid to investigate a propulsion mechanism of deformed hydrofoil profile. The shape of the hydrofoil profile was chosen by NACA04 type hydrofoil. Hermit and transfinite interpolations are used to generate internal grid points. This method can eliminate the overlaid grids at large amplitude. A fractional step method using implicit numerical viscosity is adopted for computational efficiency. We compared six kinds of thickness about difference of propulsion power. And it is clear that the non-dimensional thrust power increases with decreasing thickness.
