| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for providing an oscillation damper in a place, where it suffers a thermally heavy load such as in a combustion chamber by allowing a controller to influence the rotating speed and movement of a perforated plate according to pressure oscillations that depend on the load in the combustion chamber. SOLUTION: This device attenuates thermoacoustic oscillations generated, when a fuel 2 flowing into a combustion chamber 17 is burnt. A perforated plate 3, having an eccentric opening 4 through which the fuel 2 flows and rotating coaxially with a fuel conduit 1, is disposed in the fuel conduit 1 communicating with a burner 12, such that it is vertically movable with respect to the rotating axis. Rotating means 10 and moving means 11 for the perforated plate 3 are connected to means for measuring the amplitude and frequency of pressure oscillations in the combustion chamber 17 via a controller 18, which influences the rotating speed and movement of the perforated plate 3 corresponding to the pressure oscillations, which depend on the load in the combustion chamber 17.
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