Reheat burner and method of mixing fuel/carrier air flow within a reheat burner

摘要

The invention refers to a reheat burner that includes a flow channel for a hot gas flow with a lance arranged along said flow channel, protruding into the flow channel for injecting a fuel over an injection plane perpendicular to a channel longitudinal axis, wherein the channel and lance define a vortex generation zone upstream of the injection plane and a mixing zone downstream of the injection plane in the hot gas flow direction. The mixing zone provides at least one axially region having different cross sectional areas along its longitudinal axis with continuously changing shape, or having non circular cross section areas which change location along its longitudinal axis by continuously rotation around the longitudinal axis.

主权项

1. A reheat burner between a high pressure turbine and a low pressure turbine comprising:
a flow channel for a hot gas flow with a lance arranged along said flow channel, protruding into the flow channel for injecting a fuel over an injection plane perpendicular to a channel longitudinal axis, wherein the flow channel and lance define a vortex generation zone upstream of the injection plane and a mixing zone downstream of the injection plane in the hot gas flow direction, the mixing zone including changing cross sectional areas by continuous rotation of a non-circular cross section area shape along the longitudinal axis of the mixing zone starting at a first non-circular cross section area shape and ending at an inlet of the low pressure turbine with a non-circular last cross section area shape rotated by an angle between 0 and 180 degrees around the channel longitudinal axis.