AERODYNAMIC NOISE REDUCING METHOD (VARIANTS) AND LOW-NOISE STRUCTURAL ELEMENT FOR OPERATING IN A FLUID MEDIUM FLOW

摘要

The invention relates to aerohydrodynamics. The inventive method for reducing the aerodynamic noise generated by the separation a medium stream flowing around a structural element surface during the relative motion thereof consists in forming a low-curvature area consisting of at least one continuous section on at least one part of the structural element surface operating beyond the medium stream separation line and in orienting said structural element with respect to the medium stream in such a way that a normal line direction to the structural element surface is close or coincides with the vector velocity direction of the medium stream on the entire or the major part of said area surface. According to the second variant of the method said low-curvature is not formed at the production stage but is determined on the structural element surface of an existing structure using the features of the shape thereof. A low-noise structural element produced by the inventive method is also disclosed. Said device also can be developed in such a way that it makes it possible to optimise the use thereof in particular application cases. The aim of said invention is to reduce the aerodynamic noise without deteriorating other aerodynamic characteristics of a structure.