CPC F02C 7/045 (2013.01) [B64C 3/10 (2013.01); B64C 11/18 (2013.01); B64C 21/10 (2013.01); B64D 33/02 (2013.01); B64D 33/06 (2013.01); F01D 9/041 (2013.01); B64D 2033/0206 (2013.01); F05D 2260/96 (2013.01)] | 19 Claims |
1. A profiled air flow structure comprising:
a body having an upstream leading edge and/or a downstream trailing edge;
porous acoustically absorbent regions; and
along the upstream leading edge and/or the downstream trailing edge, a serrated profile line showing a succession of teeth and depressions,
wherein the porous acoustically absorbent regions locally form bottoms for the depressions where the porous acoustically absorbent regions occupy a part of the body to define, together with the body, the serrated profile line at the upstream leading edge and/or the downstream trailing edge, wherein each porous acoustically absorbent region has a geometric center located downstream of the bottom of the depressions in the upstream leading edge or upstream of the bottom of the depressions in the downstream trailing edge.
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