ACTIVE AERODYNAMIC SUPPRESSOR Russian patent published in 2017 - IPC F01N1/00 

FIELD: machine engineering.

SUBSTANCE: suppressor includes a housing, consisting of a cylinder shell, rigidly connected to the end circular plates with inlet and outlet nozzles. The reactive chambers, formed by the circular discs with holes, are mounted perpendicularly to the direction of aerodynamic flow motion in the housing. The reactive chambers are connected with the inlet nozzle, the resonance suppressor insert and the outlet nozzle is attched to one of the end circular plates axially-symmetrically to the housing, and the inlet nozzle is attached to the other end circular plate axially-symmetrically to the housing. The resonance suppressor insert is formed as a cylindrical sleeve, attached to the circular end plate coaxially to the housing, and consists of the acoustic chamber and a resonance chamber, formed by the rigid walls. The resonance chamber has at least two resonance inserts, fixed to the sleeve, perpendicular to its axis, and the acoustic chamber is formed by the end circular plate with an outlet nozzle, the rigid wall and the part of the resonance insert cylindrical sleeve, which is coated with the acoustic material, at least three exhausted liners, attached to the sleeve perpendicular to its axis, are located in the acoustic chamber. The walls surfaces, turning away from the resonance chamber, are coated with acoustic circular elements, and the acoustic ring elements are installed coaxially to the cylindrical housing from its inner side. The part of the end circular plate of the acoustic chamber is coated with acoustic material.

EFFECT: improved efficiency of noise suppression.

2 cl, 3 dwg