| 摘要 |
A fan assembly includes means for creating a primary air flow and an annular nozzle. The annular nozzle 302 has an inner wall 308 extends about a bore axis to define a bore of the nozzle. The inner wall 308 has a cross-sectional profile in a plane containing the bore axis which is in the shape of part of a surface of an airfoil having a leading edge 316, a trailing edge 318 towards the front of the nozzle and a chord line C4 extending between the leading edge and the trailing edge, the chord line C4 being inclined to the bore axis in a direction extending from the leading edge 316 to the trailing edge 318.. The nozzle comprises an interior passage 328 extending about the bore axis for receiving an air flow, and an air outlet 304 located at or towards the trailing edge and spaced from either side of the chord line C4 for emitting the air flow away from the inner wall 208.
|
