ACTIVE AERODYNAMIC NOISE SUPPRESSOR Russian patent published in 2018 - IPC F01N1/04 

FIELD: acoustics.

SUBSTANCE: invention relates to noise suppression. Silencer contains a housing, consisting of a cylindrical shell, rigidly connected by end round plates with inlet and outlet air pipes, wherein in housing perpendicular to aerodynamic flow direction jet chambers are arranged, formed by round discs with holes, wherein jet chambers are connected with inlet branch pipe, to one of end round plates axially symmetrical to housing silencer resonance insert and outlet branch pipe are attached, and to the other end circular plate, axially symmetrical to the housing an inlet pipe is attached, wherein the silencer resonance insert is made in form of cylindrical sleeve, attached to end round plate coaxially to housing, and consists of sound-absorbing chamber and resonance chamber, formed by rigid partitions, at that, in the resonant chamber are located, at least, two resonant inserts fixed on the sleeve, perpendicular to its axis, and the sound-absorbing chamber is formed by an end-face round plate with an outlet branch pipe, rigid partition and part of resonance insert cylindrical sleeve, which is lined with sound absorbing material, in the sound-absorbing chamber are located, at least, three fixed on the sleeve exhaust bushings, perpendicular to its axis, wherein the partitions surfaces, facing away from the resonance chamber, are lined with round sound-absorbing elements, and the sound-absorbing annular elements are installed coaxially to the cylindrical housing from its inner side, wherein a part of the end circular plate of the sound-absorbing chamber is lined with sound-absorbing material.

EFFECT: technical result is the noise suppression increased efficiency.

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