Helmholtz damper for a combustor of a gas turbine and a method for installing the helmholtz damper

A method for installing a Helmholtz damper in a combustor of a gas turbine having a combustion chamber disposed in a housing and closed off by a front plate at which a plurality of burners are exchangeably fastened, the plurality of burners being supplied with fuel via fuel lances which extend from outside the housing through a bushing of the housing to the associated burner, the Helmholtz damper including a first damping volume having a first end and a second end, the first end of the first damping volume being configured to attach a connecting passage extending to a front panel such that the Helmholtz damper is connectable with the front plate of the combustion chamber in place of one of the plurality of burners;

• a second damping volume having a first end and a second end, the second damping volume being arranged in series with the first damping volume along an axis of the Helmholtz damper with the first end of the second damping volume being detachably connected to the second end of the first damping volume so as to form a combined larger damping volume, the second end of the second damping volume being configured to attach a connecting tube extending from the second damping volume and through the bushing in place of a respective one of the fuel lances;
• wherein the first and second damping volumes are cylindrical formed and disposed concentrically with respect to each other along the axis;
• and wherein an inside diameter of the second damping volume is configured to be adjustable in steps by exchanging the second damping volume with a corresponding component having equal axial length and different inside diameter, the method comprising:
• removing at least one of the plurality of burners;
• installing the Helmholtz damper in place of the at least one of the plurality of burners that was removed;
• and
• guiding the connecting tube of the Helmholtz damper through the bushing of the housing in place of at least one of the fuel lances associated with the at least one of the plurality of burners that was removed.