초록 ▼

A jet noise suppressor is disclosed. The jet noise suppressor includes first and second high frequency pulse injection units located exteriorly of the turbine engine exhaust nozzle. The pulse injection units are located oppositely, diametrically across the exhaust nozzle. The pulse injection units i

A jet noise suppressor is disclosed. The jet noise suppressor includes first and second high frequency pulse injection units located exteriorly of the turbine engine exhaust nozzle. The pulse injection units are located oppositely, diametrically across the exhaust nozzle. The pulse injection units include a resonance tube in outlet fluid communication with an injector nozzle. High pressure gas is supplied to the resonance tubes. A second source of high pressure gas includes a switch for supplying an alternating flow of high pressure gas to the injector nozzles. The combination of the high frequency pulses emitted from the injection units with the alternating low frequency, high amplitude mode of injection across the exhaust nozzle, provides a dramatic reduction of noise as well as exhaust temperature.

대표청구항 ▼

A jet noise suppressor is disclosed. The jet noise suppressor includes first and second high frequency pulse injection units located exteriorly of the turbine engine exhaust nozzle. The pulse injection units are located oppositely, diametrically across the exhaust nozzle. The pulse injection units i

A jet noise suppressor is disclosed. The jet noise suppressor includes first and second high frequency pulse injection units located exteriorly of the turbine engine exhaust nozzle. The pulse injection units are located oppositely, diametrically across the exhaust nozzle. The pulse injection units include a resonance tube in outlet fluid communication with an injector nozzle. High pressure gas is supplied to the resonance tubes. A second source of high pressure gas includes a switch for supplying an alternating flow of high pressure gas to the injector nozzles. The combination of the high frequency pulses emitted from the injection units with the alternating low frequency, high amplitude mode of injection across the exhaust nozzle, provides a dramatic reduction of noise as well as exhaust temperature. can also have upstanding posts, is carried across the slug metering section and pivots in and out of a conveyance path of the articles in synchronism with the revolving pin bar mechanism to meter the articles. In the depacking configuration, a plurality of article gripper tubes are carried by each article pick-up head arranged in a matrix corresponding to the slug of articles. The gripper tubes have a grip position in which said articles are retained by the pick-up head at the pick-up station for transfer, and a release position in which the articles are released from the pick-up head at the release station. Advantageously, the gripper tubes have a first effective axial length for gripping articles at the pick-up station when the articles are in an upright configuration, and the gripper tubes have a second effective axial length which is compressed and shortened relative to the first axial length when striking an obstacle such as an inverted article to allow sufficient travel for all other gripper tubes to grip articles.