TWO-MODE WATER SCOOP OF WATER-JET PROPELLER OF HIGH-SPEED SHIP Russian patent published in 2002 - IPC

FIELD: shipbuilding; water scoops of water-jet propellers. SUBSTANCE: proposed propeller includes water conduit 1 with inlet hole 2 and outlet hole 3. Located over perimeter of inlet hole is ring 4 with porous elements which is connected with reservoir of polymer preparation and supply system 6 by means of pipe line 5 also provided with porous elements; system 6 is located on ship's hull 7. system 6 includes reservoir and mixer which are connected to each other and to sea water pump by means of respective pipe lines. Reservoir is also connected with compressed air supply system and mixer is connected with polymer material supply system. EFFECT: possibility of acceleration of ship due to delivery of polymer additives in boundary layer of water at water conduit inlet and height of wetted outer surface of water scoop. 1 dwg