WATER-JET PROPELLER BLADE SYSTEM Russian patent published in 2020 - IPC B63H1/00 

FIELD: machine building.

SUBSTANCE: invention relates to ship propulsors, as well as to devices for movement of environment - water and is intended to reduce degree of inhomogeneity of velocity field in aft end of underwater object. Blade system of water-jet propeller includes hub and located on it blades, placed in fixed cylindrical nozzle, in which fixed blades of opposite direction compared to direction of blade profile. Fixed cylindrical nozzle is fixed to aft end of underwater object using fixed blades, on each rear edge of which is located at least one hole for supply of water jet, serving to compensate for distortions and flow inhomogeneities associated with hydrodynamic vortex traces from the flow of fixed blades, and reducing the degree of inhomogeneity of the velocity field in the aft end of the underwater object.

EFFECT: reduced degree of inhomogeneity of velocity field in aft end of underwater object without reducing operational reliability and increasing hydrodynamic resistance.

1 cl, 1 dwg