Burner arrangement with deflection elements for deflecting cooling air flow

摘要

An exemplary burner arrangement and method for operating a burner arrangement are disclosed. During operation of the burner arrangement a hot combustion gas, including combustion air, flows essentially parallel to a burner wall through a mixing chamber, which is delimited by the burner wall, to a combustion chamber. In the mixing chamber the hot combustion gas is mixed with an injected fuel, where cooling air from the outside of the burner wall flows through effusion holes in the burner wall into an interior of the mixing chamber. The cooling air, on the outside of the burner wall, is deflected in a directed manner in its flow direction by means of deflection elements which are in a distributed arrangement.

主权项

1. A method for operating a burner arrangement, comprising:
flowing a hot combustion gas, including combustion air, parallel to a burner wall through a mixing chamber, which is delimited by the burner wall, to a combustion chamber; mixing the hot combustion gas with an injected fuel in the mixing chamber; feeding a cooling air along the burner wall; and arranging a perforated plate with holes on the outside of the burner wall and at a distance from said burner wall, and introducing the cooling air on a side of the perforated plate which faces away from the burner wall, and deflecting the cooling air with deflection elements into the holes of the perforated plate and towards the burner wall, wherein each of the deflection elements are arranged on the outside of the perforated plate over an inlet of at least one of the holes of the perforated plate; and flowing the cooling air from outside of the burner wall through effusion holes in the burner wall into an interior of the mixing chamber, and wherein the effusion holes extend through the burner wall from a side facing the perforated plate to a side of the wall facing the hot combustion gases.