| 摘要 |
A ducted fan air-vehicle (100) having an air duct (102) and a fan (104) is described. The air duct (102) includes an outer rim (105) and an inner rim (107), and the fan (104) is located within the air duct (102) and rotates in a direction. The fan (102) also includes a hub (200), a plurality of struts (202) extending from the hub (200) and positioned adjacent the outer rim (105) of the fan (102), a plurality of stators (204) extending from the hub (200) and positioned adjacent the inner rim (107) of the fan (102), and a plurality of rotor blades (206) extending from the hub (200) and positioned between the plurality of struts (202) and the plurality of stators (204). The stators (204) are lean in a plane of fan rotation and swept in a plane normal to fan rotation to create the optimum amount of noise reduction in the ducted fan air-vehicle (100).
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