Abstract
The three-dimensional wing with winglet has lower induce drag and larger lift-drag ratio than without winglet. In order to save the power for ship propulsion, the research on marine propeller with small wings at blade tips, i.e."Bladelet Propeller", was carried out in the circulating water channel, using series model propellers had 300mm diameter. The flow visualization used in this experiment was the oil film method and surface tuft method. It was obtained the guide for the design of bladelet by this experimental result.
