Patent ID: 6634457
Filing Date: 2003-10-21
Classification: F01N,F23D,F23M,F23R

Abstract:
Apparatus for damping acoustic vibrations in a combustor, comprising:a Helmholtz resonator having a resonance volume and a connecting channel through which the combustor can be connected with the resonance volume, a hollow body having a volume and a fluid supply line in fluid communication with the volume, the hollow body being configured and arranged to change the hollow body volume by adding or draining a fluid via the supply line, the hollow body being located at a position selected from the group consisting of (a) in the Helmholtz resonator and (b) adjacent to the Helmholtz resonator; wherein the resonance volume of the Helmholtz resonator is changed when the volume of the hollow body is changed; and a regulator in fluid communication with the supply line, the regulator regulating the addition or draining of the fluid via the supply line as a function of the frequency of a highest vibration amplitude in the combustor.