| 摘要 |
An atomising nozzle (10) has an inlet (16), an outlet orifice (21) and an internal fluid flow passageway (20) which connects the inlet (16) to the outlet orifice (21). The nozzle (10) has a body with two component parts (12A, 12B) each component part having an abutment surface (22, 24) which contacts a corresponding abutment surface on the other of the parts. At least one of the abutment surfaces has at least one groove and/or recess (26a-34a; 26b-34b) therein to define part of the fluid flow passageway (20), including an expansion chamber (28). The body has a fixed partition means (44) which extends into the expansion chamber (28) to define one or more than one constricted openings (48) through which fluid is constrained to flow. The constricted opening has a cross sectional area larger than that of the final outlet orifice (21) and is positioned outwardly of an axially central region (52) of the expansion chamber (28) so that the partition means (44) blocks the flow of fluid through said axially central region. At least one of the constricted opening(s) (48) is non-circular when viewed in lateral cross-section.
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