Apparatus for suppressing combustion noise within gas turbine en

Details Apparatus for suppressing combustion noise within gas turbine en Apparatus for suppressing combustion noise within gas turbine en

1976-12-27

1978-10-31

Garrett, Robert E.

Power plants

Combustion products used as motive fluid

External-combustion engine type

60 3969R, 431114, F02C 724

Patent

active

041226747

ABSTRACT:
A burner can, including a noise suppressing cavity, for use in the combustor assembly of a gas turbine engine to minimize the combustion noise emitted by the engine, is disclosed. The cavity is mounted at an end of the burner can that includes a fuel nozzle for injection of fuel into the interior of the burner can and is in acoustic communication with the interior of the burner can via a perforated metal sheet that forms a partition between the burner can and the cavity. The cavity is dimensioned and arranged in view of the acoustic transmission system formed by the burner can and the duct system that interconnects the burner can with the engine turbine stage to exhibit an acoustic impedance which minimizes the propagation of combustion noise from the burner can through the engine turbine stages to thereby reduce the engine noise level.

REFERENCES:
patent: 2657531 (1953-11-01), Pierce
patent: 2664702 (1954-01-01), Lloyd et al.
patent: 2933895 (1960-04-01), Cheeseman

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