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 moving through bubbly flow fields generated in proximity of hull surfaces by jetting gas through a plu rality of jet nozzles provided on hull surfaces of the ship. The gas flow rate is controlled s o as to establish a peak void fraction in a turbulent boundary layer, by applying an obs ervation that the location of a peak void fraction shifts away in a direction normal to the hu ll surface with increasing gas flow rate through the jet nozzles.