Patent ID: 8281597
Filing Date: 2012-10-09
Classification: F23R,Y02T

Abstract:
1. A swirl cup comprising: an annular inner swirler having a row of pilot swirl vanes and cooperating pilot fuel injector; an annular outer swirler having a row of main swirl vanes and a cooperating main fuel injector; a tubular centerbody disposed radially between said inner and outer swirlers, and coaxial therewith; said centerbody including an annular bypass inlet surrounding said inner swirler and diverging aft along a perforate pilot nozzle to terminate at an annular flameholder; and said centerbody further including an impingement ring spaced forwardly from said flameholder in flow communication with said bypass inlet for receiving cooling air therefrom, said impingement ring including a plurality of impingement holes configured to direct cooling air at said flameholder and being spaced radially around said pilot nozzle; and an annular outer manifold extending in fluid communication between said bypass inlet and said impingement ring, and an annular inner plenum disposed coaxially inside said outer manifold and around said pilot nozzle, and terminating axially between said impingement ring and said flameholder.