Patent ID: 6178737
Filing Date: 2001-01-30
Classification: F02C,F16K,F23L,F23R

Abstract:
A method for controlling the pressured drop across a combustor disposed between a compressor and a turbine in a gas turbine engine as the power level of the engine changes, comprising the steps of:operating said engine at a first power level;collecting pressurized air from said compressor in a plenum;flowing a first portion of said air through dilution holes in a wall of said combustor into a dilution zone upstream of said turbine;flowing a second portion of said air through a conduit extending from said plenum to an injector;mixing the air exiting said conduit with fuel in said injector and igniting the mixture to form a hot gas in said combustor upstream of said dilution zone;diverting a portion of the air in said conduit around said injector and into said combustor near said dilution zone; andcontrolling the magnitude of said diverted portion to achieve a first desired pressure drop across said compressor.