The invention relates to an axial-flow type double-duct water-jet
propeller, and belongs to the field of fluid
mechanical engineering and ship propulsion. The invention aims to solve the problem that an existing axial flow type water-jet
propeller is low in lift. The
propeller is composed of a support, an outer duct transmission shaft, a water inlet runner, an outer duct
impeller chamber, an outer duct guide vane chamber, a
nozzle, an outer ducted
impeller hub, outer ducted
impeller blades, outer ducted guide vane blades, an inner ducted transmission shaft, an inner ducted impeller hub, an inner ducted guide vane hub, an inner ducted impeller chamber, an inner ducted guide vane chamber, inner ducted impeller blades, inner ducted guide vane blades and a
flange plate. According to the axial-flow type double-duct water-jet propeller, on the premise that large flow is guaranteed, the lift of the water-jet propeller can be improved, the
cavitation resistance is improved, the axial-flow type water-jet propeller can be applied to propelling of a high-speed navigation body, and meanwhile the defects that a multi-stage water-jet propeller is large in weight, large in space size and the like are overcome through the axial-flow type double-duct water-jet propeller.