An Experimental Study on the Above-Water Bow Shape with a Small Added Resistance in Waves

Abstract

Two types of above-water bow shapes have been developed for the reduction of the added resistance in waves. The new shapes are named the pelican type and the beak type respectively. Series measurements of the added resistance in regular waves have been carried out with variation models of the above mentioned two types. The experimental results showed that the pelican type could not reduce the added resistance, on the contrary, the beak type could reduce it. Some explanations are presented on the mechanism of the reduction of the added resistance in waves with the variation of the above-water bow shape. From the practical viewpoint, the potential candidate of the above-water bow shape for the reduction of the added resistance in waves is discussed.