System for damping thermo-acoustic instability in a...

Details System for damping thermo-acoustic instability in a... System for damping thermo-acoustic instability in a...

2004-12-15

2010-02-16

Cuff, Michael (Department: 3741)

Power plants

Combustion products used as motive fluid

Combustion products generator

Reexamination Certificate

active

07661267

ABSTRACT:
A system for damping thermo-acoustic instability in a combustor device for a gas turbine, the combustor device including at least one combustion chamber, in particular of an annular type, and at least one burner associated to the combustion chamber and mounted in a position corresponding to a front portion set upstream of the combustion chamber; the damping system including at least one Helmholtz resonator including a casing defining inside it a pre-set volume and a neck for hydraulic connection between the pre-set volume and the combustion chamber, the neck being connected to one side of the combustion chamber at a distance from the front upstream portion thereof provided with the at least one burner. The casing of the resonator includes structure which varies the pre-set volume within a pre-set range and structure which delivers a cooling fluid.

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