Resonator device for damping the pressure oscillation within a combustion chamber and a method for operating a combustion arrangement

It is described a resonator device (101, 301) for damping a pressure oscillation within a combustion chamber (330), the resonator device comprising: a container (102, 302) filled with a gas; an opening (106, 306) in the container; and a heating element (103, 303) adapted to generate a flame, wherein the flame is arranged to heat the gas within the container. The resonator device is comprised in a combustion arrangement, further comprising a combustion chamber (330) for defining a combustion space for burning fuel, wherein the container is connected to the combustion chamber such that an inside of the container is in communication with the combustion space via the opening (306), wherein the resonator device has a resonance frequency equal to a pressure oscillation frequency within the combustion chamber under normal load conditions.