Patent ID: 7677025
Filing Date: 2010-03-16
Classification: F02C,F05D,F23D,F23R

Abstract:
1. A self-purging pilot fuel injection system, said injection system comprising: A radial inflow swirler, said swirler having at least one set of swirlers oriented generally perpendicular to a combustor centerline; An end plate having a generally axially extending centerbody, the axially extending centerbody located substantially along said combustor centerline and having an outer surface; A first fuel supply located in said end plate; A plurality of first fuel injection orifices that are operable to inject fuel parallel to the combustor centerline, the plurality of first fuel injection orifices located along the axially extending centerbody outer surface in a direction generally parallel to the combustor centerline, said first plurality of fuel injection orifices for supplying fuel from said first fuel supply to a region immediately adjacent said center body; A second fuel supply located in said end plate radially outward of said first fuel supply; A plurality of second fuel injection orifices that are operable to inject fuel perpendicular to the combustor centerline, the plurality of second fuel injection orifices located proximate said swirler and oriented generally perpendicular to the combustor centerline for supplying fuel from said second fuel supply to a stream of air passing through said swirler; and, Wherein a fluid containing at least air passes along said outer surface and over said plurality of first fuel injection orifices in a manner so as to prevent flame attachment proximate said plurality of first fuel injection orifices.