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US 6,305,927 B1Granted
Burner with acoustically damped fuel supply system
AssigneeABB Alstom Power (Schweiz) AG
InventorJakob J. Keller
Life of this patent
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Abstract
In a burner (14) with at least one fuel supply system (15, 16) through which the burner (14) is fed a fuel flow (12), and the fuel fed is injected via fuel nozzles and subsequently burned in a combustion chamber (11), the formation and amplification of pressure fluctuations in the combustion chamber is prevented in a simple way in terms of design by virtue of the fact that means (17) are provided which prevent periodic pressure fluctuations which occur in the combustion chamber from leading to fluctuations in the fuel flow (12) in the fuel supply system (15, 16).
Claims11
A burner comprising:
- a burner body having a combustion chamber;
- a fuel nozzle positioned to inject fuel into the burner body;
- at least one fuel supply system through which the burner can be fed a fuel flow through the fuel nozzle and subsequently burned in the combustion chamber;
- means for preventing acoustic pressure oscillation in the combustion chamber from leading to fluctuations in the fuel flow in the fuel supply system;
- wherein the means for preventing comprises at least a first volume arranged directly upstream of the fuel nozzle, through which first volume the fuel flow can flow, and a first constriction upstream of the first volume, the fuel supply system being arranged upstream of the first constriction;
- wherein the first volume comprises an annular distribution chamber and distribution channels which are arranged downstream of the annular distribution chamber and run at least partially outside the burner so that the fuel can flow from the distribution channels through the fuel nozzle into the combustion chamber.
3 more elements
Dependencies are inferred from the claim text.