Arrangement for reduction of acoustic vibrations in a...

F - Mech Eng,Light,Heat,Weapons – 23 – D

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Details

F23D 23/00 (2006.01) F23C 5/08 (2006.01) F23R 3/42 (2006.01) F23R 3/46 (2006.01)

Patent

CA 2340391

The invention refers to a combustion chamber device including a combustion chamber (2) and a set of burners (6) with an outlet opening (7) in the combustion chamber. Each burner includes members (10) for the supply of a flow of oxygen-containing gas, members (8) for the supply of fuel, and a space (9), which extends to the combustion chamber (2) for mixing of the fuel and the oxygen-containing gas. Each burner (6) is arranged to convey a substantially equally large flow of oxygen-containing gas through the burner to the combustion chamber. Each burner (6) is defined by at least one parameter including a characteristic length (a) of the space (9) along the longitudinal direction (x). At least the characteristic length (a) of at least one of the burners is selected in such a way that it deviates from the corresponding length (a) of another burner and in such a way that the influenc of the oscillations which arise during operation of the combustion chamber device are reduced.

L'invention concerne un dispositif à chambre de combustion qui comprend une chambre de combustion (2) et un ensemble de brûleurs (6) dont une ouverture de sortie (7) débouche dans la chambre de combustion. Chaque brûleur comprend ce qui suit: des éléments (7) servant à acheminer le flux d'un gaz contenant de l'oxygène; des éléments (8) d'alimentation en carburant; et une enceinte (9) qui fait saillie dans la chambre de combustion (2) et sert à mélanger le carburant et le gaz contenant de l'oxygène. Chaque brûleur (6) est aménagé pour amener dans la chambre de combustion à travers le brûleur un flux sensiblement important et égal de gaz contenant de l'oxygène. Chaque brûleur (6) est défini par au moins un paramètre comprenant une longueur caractéristique (a) de l'enceinte (9) dans une direction longitudinale (x). Au moins la longueur caractéristique (a) d'au moins un des brûleurs est sélectionnée de manière à dévier de la longueur correspondante (a) d'un autre brûleur et à réduire l'influence des oscillations engendrées par le fonctionnement du dispositif à chambre de combustion.

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