Patent ID: 6907736

Claim:
A gas turbine combustor comprising a combustor wall configured to absorb acoustic energy of a combustion variation, the combustor wall including a first perforated plate, a second perforated plate, and a back plate, the back plate being disposed outside the first perforated plate and the second perforated plate in a radial direction and spaced apart from the first perforated plate and the second perforated plate by a gap, wherein the second perforated plate has cooling pipes embedded therein that are configured to receive cooling fluid, and wherein the first perforated plate has openings which are positioned such that a distance L 1 between the openings in a longitudinal direction and a distance L 2 between the openings in a circumferential direction have a relationship of 0.25≦L 1 /L 2 ≦4 and positions of the openings adjacently arrayed in a row in the circumferential direction are offset such that the positions of the openings in every other row are aligned in the longitudinal direction.