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1. (WO2017034537) METHOD AND APPARATUS WITH ARRANGEMENT OF FUEL EJECTION ORIFICES CONFIGURED FOR MITIGATING COMBUSTION DYNAMICS IN A COMBUSTION TURBINE ENGINE

Pub. No.:    WO/2017/034537    International Application No.:    PCT/US2015/046498
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Tue Aug 25 01:59:59 CEST 2015
IPC: F23R 3/28
F23D 14/06
F23D 14/10
Applicants: SIEMENS AKTIENGESELLSCHAFT
Inventors: PORTILLO BILBAO, Juan Enrique
RAJARAM, Rajesh
PRADE, Bernd
PENT, Jared M.
Title: METHOD AND APPARATUS WITH ARRANGEMENT OF FUEL EJECTION ORIFICES CONFIGURED FOR MITIGATING COMBUSTION DYNAMICS IN A COMBUSTION TURBINE ENGINE
Abstract:
Apparatus and method for a combustion turbine engine are provided. A pre-mixing passage (24) has an upstream inlet arranged to receive a flow of air to be mixed with fuel. A fuel-injecting lance (12) is disposed in the pre-mixing passage. At least a first fuel ejection orifice (40) is disposed at a first axial location of the fuel-injecting lance. At least a second ejection orifice (42) is disposed at a second axial location of the fuel-injecting lance. A spacing between the first and second axial locations is arranged to effect oscillatory interference patterns in pockets comprising mixtures of air and fuel that flow towards a downstream outlet of the pre-mixing passage. The oscillatory interference patterns may be effective to promote homogeneity in the mixtures of air and fuel and dampen thermoacoustic oscillations in a flame (46) formed upon ignition of the mixtures of air and fuel.