FIELD: machine building.
SUBSTANCE: proposed device comprises stacked two or more ring plates. Every plate has perimetre and hollow central part arranged concentrically relative to stack lengthwise axis in placing said plates one onto another. Besides, every plate comprises, at least one inlet intermediate sector with inlet flow stage to form first inlet zone and first outlet zone, and, at least, one outlet flow sector with outlet flow stage to form second inlet zone and second outlet zone. Note here that second inlet zone area-to-second outlet zone area ratio is selected to create back pressure to outlet flow stage to provided for subsonic floe nearby aforesaid perimetre.
EFFECT: reduced flow pressure and aerodynamic noise.
18 cl, 4 dwg
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SU1096380A1 |
