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

FIELD: instrument engineering.

SUBSTANCE: invention refers to noise suppression technique. Noise suppressor contains the cylindrical casing, which is rigidly connected with the end inlet and outlet pipes, with the central partition, the housing is internally lined with sound-absorbing material, and the central partition is made in the form of sound-absorbing element that has the frame, which is lined on both sides with sound absorbing material, where the sound-absorbing element has the possibility of rotating in the plane perpendicular to the direction of the aerodynamic flow, the sound-absorbing element is made in the form of the rigid and perforated walls, between which the multilayer sound absorbing element is located, which is made in the form of two layers: one of which, being adjacent to the rigid wall, is sound-absorbing, and the other, being adjacent to the perforated wall, is made with the perforation made of sound-reflecting material of complex profile, which consists of the uniformly distributed hollow tetrahedrons, while the material based on aluminum-containing alloys is used as the sound-reflecting material with their further filling with titanium hydride or air.

EFFECT: technical result is the increased efficiency of noise suppression.

1 cl, 3 dwg