DEVICE FOR GAS DISCHARGE FROM GAS-TURBINE ENGINE AND GAS-TURBINE ENGINE Russian patent published in 2015 - IPC F02C7/24 

FIELD: engines and pumps.

SUBSTANCE: device for gas discharge from a gas-turbine engine includes external and internal walls forming a gas passage circuit between each other. The internal wall forms a central housing determining an internal cavity, and the external wall is perforated and interconnected with the external resonant cavity with a possibility of noise absorption of the first range of acoustic frequencies. Between external and internal cavities there located is a device for establishment of interaction as to fluid medium, which passes through the gas passage circuit. The internal cavity also forms a resonant cavity for noise absorption of the second range of acoustic frequencies. The device for establishment of interaction as to fluid medium includes radial sleeves also performing a function of retention of the central housing. The other invention of the group relates to a gas-turbine engine containing the above gas discharge device.

EFFECT: group of inventions allows noise absorption of two ranges of acoustic frequencies without any increase of volume of cavities located on the outer side of the gas circuit.

8 cl, 3 dwg