GAS FLOW SILENCER Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: silencer has cylindrical housing 1 with tangential intake branch pipes 2 and exhaust branch pipe 3. Sound-absorbing inner members 4 and outer members 5 form flow of gases moving on a spiral path at varying radius of rotation. Part of gases enters gas duct 9 located axially relative to silencer and is discharged to end of silencer where it is mixed with main flow of gases. Exhaust noise is reduced through equalizing the gas velocity in section of flow and dampening the pressure fluctuations of gas flow. Bypass passage for discharge of part of gas flow through central gas duct reduces rise of aerodynamic resistance of silencer is case of rise of rate of gas flow through silencer. EFFECT: enhanced efficiency and reduced hydraulic resistance. 10 cl, 4 dwg