Experimental study on Butttock Flow stern

Abstract

Aiming to reduce the viscous resistance of fat and low speed ships as tankers, new ship form encouraging buttock flow is proposed.
Resistance and self-propulsion tests of C_b=0.88 and 0.84 model are proceeded. Characteristics of the new ship form are remarkably less profile drag and less wake gain.
The latter defect can be improved by properly designed skeg form and bilge corner form.