FLOW SWIRLER Russian patent published in 2013 - IPC B01D45/16 

FIELD: process engineering.

SUBSTANCE: invention relates to fluid or gas swirlers. Proposed swirler is made of coiled strip, coil turns being interconnected by their edges to make hollow case. Said coiled strip features wavy bends made along flexure lines arranged at an angle to its lengthwise edges to form multistart screw surface with screw grooves arranged inside and outside. Said screw groves are directed in one direction at 5°-45° to case lengthwise axis to make curved pockets with centers of curvature located inside and outside case cross-section. Said pockets differ in shape and size. Distance between flexure lines equal the sum of perimeters of pockets of inner and outer surfaces.

EFFECT: higher efficiency, lower drag.

7 dwg