The study on ship resistance reduction is always a meaningful and interesting work in the filed of ship research. A new kind of bow wave suppression & drag reduction appendage is presented in this paper. The ship model experiment and numerical simulation about this new bow appendage were carried out, it is shown that, for the Deep V form ship model with this kind of appendage, the bow wave peak height is cut down significantly and the hull wave pattern changes evidently; the total resistance at Froude Number of 0.448 could be reduced by 6.67%. Furthermore, the influence of the appendage length, breadth and position on the drag reduction effect was studied by experiment. The total resistance reduction of above 5% with ship model scale would be obtained at the Froude Number above 0.4.
Reducing the ship resistance is always a hot issue in the field of ship performance research. The resistance components of the ship include frictional resistance, shape resistance and wave making resistance. Generally, frictional resistance and wave making resistance take a great part in total resistance. Under a certain speed, friction resistance depends on the wetted surface area of the ship, reduce the wetted surface area of conventional displacement ship is very difficult. Some frictional resistance reducing methods, such as boundary layer control technology, drag reduction with micro-bubble technology (ZHU Xiao-gu, 2014), etc., have not been widely applied in the field of ship engineering. The wave making resistance is caused by the disturbance of the ship to the surface of the water, and the wave making resistance is greatly influenced by the ship form and speed. Researchers have carried out lots of studies to reduce the wave making resistance, and obtain many achievements, such as hull form optimization WANG Chao, 2012), new ship form method (HUANG Xing, 2013), bulbous bow method (CHEN Xiaping, 2014 and WANG Zhong, 2008), stern flap method, and anti-wave hydrofoil method (LU Xiaoping, 1999). These methods have been applied very widely.
