Generation of bubbles for friction-reducing ship and method for reducing skin-friction

摘要

A method is provided for reducing skin-friction of a ship (1) moving through bubbly flow fields generated in proximity of hull surfaces (3) by jetting gas through a plurality of jet nozzles (6) provided on hull surfaces of the ship. The gas flow rate is controlled so as to establish a peak void fraction in a turbulent boundary layer, by applying an observation that the location of a peak void fraction shifts away in a direction normal to the hull surface with increasing gas flow rate through the jet nozzles. <IMAGE>