Abstract
In order to develop products which satisfy various demands for a limited period, shape optimization technology by using Adjoint method has been developed. In this study, we developed CFD calculation technique by using Immersed boundary method which does not require mesh to regenerate for modified shape, in order to operate the shape optimization process automatically. Present technology was applied to design of engine intake port to achieve a balance the maximization of flow rate and that of tumble vortex. As a result, the optimized shape which has superior flow performance compared to the conventional design shape was obtained efficiently.