| 摘要 |
A radially-extending arm (48) rotates within a stream of first fluid (30) flowing thereacross. The arm (48) comprises a plurality of lands (52) locate d at different radial distances from the axis of rotation (50). A port (58) located on each land (52) is operatively coupled to a source of a second flu id (22), which is sprayed (74) from the rotating arm (48) into the stream of first fluid (30) flowing across the lands (52), and is thereby atomized. In other embodiments: 1) the arm (30) comprises a land (52) stepped into the trailing edge (56) thereof, and a port (58) for injecting the second fluid (22) is located on the land (52); 2) the land (52) comprises a groove (96) located between the port (58) and an associated riser surface (88) stepped into the trailing edge (56); and 3) the arm (48) comprises a port (58) in th e trailing edge (56) thereof from which the second fluid (22) is injected, and a groove (96) is located on the trailing edge (56, 98) in a radially increasin g direction from the port (58).
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