Patent ID: 9347663
Filing Date: 2016-05-24
CPC Classification: F23C,F23D,F23R,Y10T

Claim Text:
1. A swirler, comprising: an annular housing with limiting walls having an inlet area, and an outlet area in a first main flow direction prevailing in the swirler; at least two vanes, arranged in the annular housing, each vane having a streamlined cross-sectional profile, which extends with a longitudinal direction perpendicularly or at an inclination to the first main flow direction; wherein a leading edge area of each vane has a profile, which is oriented parallel to a second main flow direction prevailing at a leading edge position, and wherein the profiles of the vanes turn from the second main flow direction prevailing at the leading edge position to impose a swirl on the flow, wherein, with reference to a central plane of the vanes, trailing edges are provided with at least two lobes alternatingly extending out of the central plane in opposite transverse directions; wherein a traverse deflection from the central plane of two adjacent vanes, which form the lobes, are inverted, and a transition from a planar leading edge region to the deflections is smooth with a surface curvature representing a function with a continuous first derivative; wherein a transverse displacement of each vane forming the lobes, is at most, in the downstream two thirds of a length of the vane and the transverse displacement of each vane, which forms the lobes, has a sinusoidal form or a semi-circular form or a triangular form or a rectangular form.