ACOUSTIC DAMPER, COMBUSTOR AND GAS TURBINE

摘要

PROBLEM TO BE SOLVED: To provide an acoustic damper capable of excellently damping the gas vibration of a vibrating gas introduced into an acoustic tube without requiring any complicated variable mechanism for changing the length of the acoustic tube even if the generated frequency of the vibrating gas from a gas turbine or the like is displaced from a target frequency from the acoustic tube of the acoustic damper.SOLUTION: An acoustic damper 1520 changes the speed of a sound of a vibrating gas introduced into an acoustic tube 1521 of a predetermined length by a sound speed variable mechanism 1600. Thus, even if a generated frequency of the vibrating gas is displaced from a target frequency of the acoustic tube 1521, the target frequency of the acoustic tube 1521 can made to correspond to the generated frequency of the vibrating gas by a change in a speed of a sound.