Gas turbine combustor

摘要

A gas turbine combustor is provided with a combustor basket where combustion gas flows, the combustion gas being produced by combustion of fuel injected from a nozzle, and a first resonance device and a second resonance device mounted on an outer surface of the combustor basket. The second resonance device is disposed on a downstream side from the first resonance device in a flow of the combustion gas and damps combustion oscillation of a frequency higher than the first resonance device. The first and second resonance devices are acoustic liners each having a housing mounted to the outer surface of the combustor basket. A resonance space surrounded by the housing and the outer surface of the combustor basket communicates with an interior space of the combustor basket via a plurality of acoustic holes formed in the combustor basket.

主权项

1. A gas turbine combustor comprising:
a combustor basket in which combustion gas flows, the combustion gas being produced by combustion of fuel injected from at least one nozzle; and a plurality of acoustic liners each including a housing mounted on an outer surface of the combustor basket, the housings of the plurality of the acoustic liners being separate from each other so that each of the housings together with the outer surface of the combustor basket forms an individual resonance space for each of the acoustic liners, wherein each housing is mounted to an outer surface of a diverging portion of the combustor basket, wherein the plurality of the acoustic liners includes: a first acoustic liner disposed on an upstreammost side in terms of a flow direction of the combustion gas; and a second acoustic liner for damping combustion oscillation of a frequency higher than the first acoustic liner, the second acoustic liner being mounted on the outer surface of the combustor basket so as to be disposed on a downstream side from the first acoustic liner in a flow of the combustion gas, wherein the individual resonance space of each of the acoustic liners communicates with an interior space of the combustor basket via at least one acoustic hole formed through the combustor basket.