Three-dimensional vortex wake cancelling jet propulsion method

A method of propelling a submersible comprising the steps of:

• aligning a cylindrically-shaped hull, a forward nose portion, and an aft coaxially tapered curvature surface portion on a longitudinally extending axis;
• shaping said aft tapered curvature surface portion to have symmetrical rounded lateral contours laterally disposed from said longitudinal axis and rounded longitudinal contours extending from a leading end to a symmetrical apex at its trailing end;
• mounting said leading end of said aft tapered curvature surface portion on said hull to locate said symmetrical apex at its trailing end on said longitudinally extending axis;
• creating volumes of pressurized water inside of said aft tapered curvature surface portion with a high-volume pump inside of said leading end;
• arranging a plurality of equal-distantly-spaced-apart jets extending through said aft tapered curvature surface portion in a circumferentially extending row around said aft tapered curvature surface portion;
• angling each of said jets to point outwardly from said aft tapered curvature surface portion;
• and
• jetting water from said volumes of pressurized water through said jets to form a spinning toroidal vortex of swirling jetted water on a down slope surface of said aft tapered curvature surface portion.

A combination underwater propulsion system and ship to reduce noise and increase efficiency of propulsion comprising:

• a ship having a motor driven pump connected to a hollow strut at its aft end, said pump being a high-volume pump to create volumes of pressurized water from ambient water;
• an underwater propulsion system having a cylindrically-shaped hull having a nose portion and being connected to said strut;
• a tapered portion having a coaxially tapered curvature surface mounted aft on said hull, said hull, rounded nose portion and aft tapered curvature surface portion being coaxially symmetrically disposed around a common longitudinally extending axis, said coaxially disposed aft tapered curvature surface portion having a leading end essentially the same diameter as said hull and a symmetrical apex at its trailing end on said longitudinal axis, and said aft tapered curvature surface portion having symmetrical rounded lateral contours laterally disposed from said longitudinal axis and rounded longitudinal contours extending from said leading end to said symmetrical apex;
• and
• a plurality of equal-distantly-spaced-apart jets extending through said aft tapered curvature surface portion and being arranged in a circumferentially extending row around said aft tapered curvature surface portion, each of said jets being angled to point outwardly from said aft tapered curvature surface portion, and emitting jetted water from said volumes of pressurized water to form a spinning toroidal vortex of swirling jetted water on a down slope surface of said aft tapered curvature surface portion.