FIELD: aviation.
SUBSTANCE: invention relates to a profiled structure elongated in a direction, in which the structure has a length blown with an airflow, and transversely to which the structure contains front edge (164) and/or rear edge, at least one of which is profiled and has, in the specified direction, elongations of serration (28a), formed with cogs (30) and recesses (32) following each other. Along the profiled front edge and/or rear edge, cogs (30) and recesses (32) following each other are made only on part of the specified length blown with an air flow, on which an amplitude and/or an interval between cogs monotonously alternate, except for several cogs nearest to each end of the specified part, while remaining part (280) of the specified length is smooth.
EFFECT: invention provides reduction in noise, decrease in aerodynamic losses, reduction in mechanical stresses.
14 cl, 25 dwg
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