Premix burner for a gas turbine

摘要

A premix burner is provided for a gas turbine, in the form of a double-cone burner, which has two partial cone shells which are arranged nested one inside the other, forming air inlet ducts between them, through which combustion air from the outside flows into a conical inner space of the premix burner. Linear rows of holes of injection openings, which extend transversely to the flow direction of the combustion air, are arranged on the outer walls of the air inlet ducts and through which a gaseous fuel is injected into the combustion air which flows past transversely to them. A method for reworking such premix burners is also provided.

主权项

1. A premix burner for a gas turbine, in the form of a double-cone burner, comprising two partial cone shells arranged nested one inside the other, forming air inlet ducts between the two partial cone shells, through which outside combustion air flows into a conical inner space of the premix burner, wherein linear rows of holes of injection openings, which extend transversely to a flow direction of the combustion air, are arranged on the outer walls of the air inlet ducts and through which a gaseous fuel is injected into the combustion air which flows past transversely to the injection openings, the injection openings have a diameter ratio of a diameter of the injection opening to an effective outlet diameter of the premix burner between 0.011 and 0.015, wherein the diameter of a circle which has the same area as an outlet opening of the premix burner, which is an opening formed by the two partial cone shells at an end of the two partial cone shells opposite to the end where the gaseous fuel is injected, is defined as the effective outlet diameter of the premix burner.