Suction vent at recirculation zone of combustor
AssigneeUnited Technologies Corporation
InventorRobert M. Pierce
Life of this patent
Estimating the term…
Abstract
A centrally disposed vent is positioned adjacent the low pressure region of recirculating gases in a combustor or augmentor of the type used in gas turbine engines, allowing gas to be abstracted from the core of the recirculating region, thereby causing a reduction in static pressure, and a strengthening and stabilizing of the recirculating flow pattern. Combustion occurring in the recirculating gas is intensified by virtue of higher mixing rates, and flame stability is enhanced by virtue of increased stability of the recirculating flow pattern. The vent is shown employed in a premixing tube device for use in gas turbine engine main combustors. Alternative main combustor and augmentor combustor configurations are shown.
Claims9
In combination in a gas turbine engine, a cumbustion section including a burner means, means for forming a region of recirculating fuel/air mixture in said burner means having a flow pattern suitable for combustion, means for reducing the pressure within the recirculating region for strengthening and stabilizing the recirculating flow pattern, said pressure reducing means including a vent conduit means, said vent conduit means having one end located at the recirculating region and the other end connected to a region of lower pressure for removing flow from said recirculating region, said vent conduit including a probe which extends into the recirculating region to withdraw gases therefrom.
In combination in a gas turbine engine, a combustion section including a burner means, means for forming a region of recirculating fuel/air mixture in said burner means having a flow pattern suitable for combustion, said means for forming a region of recirculating fuel/air mixture including a first opening at the forward end of said burner means, a centerbody supported in said first opening forming an annular opening, said annular opening having means for swirling the flow entering the burner means, means for reducing the pressure within the recirculating region for strengthening and stabilizing the recirculating flow pattern, said pressure reducing means including a vent conduit means, said vent conduit means having one end located at the recirculating region and the other end connected to a region of lower pressure for removing flow from said recirculating region, said vent conduit means having its one end extending through said centerbody to a second opening at the center of the centerbody facing the region of recirculating fuel/air mixture.
Dependencies are inferred from the claim text.