Abstract: A device controlling vortex structures in a turbulent air jet flowing out of an air exhaust channel, which is constituted by at least one pair of needles connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures. In a method for controlling vortex structures in a turbulent air jet, at least one pair of needles connected to an AC voltage source create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures.

Abstract: The proposed device for controlling vortex structures (5) in a turbulent air jet (3) flowing out of the air exhaust channel, which is constituted by at least one pair of needles (1) connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pullsating corona discharge on the vortex structures. hi the proposed method for controlling vortex structures in a turbulent air jet, at least one pair of needles connected to an AC voltage source to create a pulsating corona discharge between the needles. One needle is located along and the other across the flow to produce a resonant effect of the pulsating corona discharge on the vortex structures.

Abstract: The invention relates to aerodynamic. The inventive method for reducing the aerodynamic noise generated by separation a medium stream streaming 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 with a structural element surface is close to or coincides with the vector velocity direction of the medium stream on the entire or major part of the area surface. According to the second variant of the method the 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.