PROPELLER IN AN ANNULAR NOZZLE Russian patent published in 2022 - IPC B63H1/14 

FIELD: shipbuilding.

SUBSTANCE: invention relates to the field of shipbuilding, and in particular to nautical propellers that ensure the movement and maneuvering of the ship. The propeller is placed in the annular nozzle and contains a hub and propeller blades with an asymmetric contour, which are offset from the perpendicular to the axis of rotation of the propeller to spread the load. The blade sections have a predetermined angle of attack to ensure a constant propeller pitch, and the blade contours have a variable curvature.

EFFECT: increased thrust and propulsive efficiency of the propeller, as well as reduced cavitation and facilitated rotation of the propeller.

1 cl, 1 ex, 4 dwg