Method and apparatus with arrangement of fuel ejection orifices configured for mitigating combustion dynamics in a combustion turbine engine

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 mixturesof 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. 提供了用于燃烧涡轮发动机的装置和方法。预混合通道(24)具有布置成接收待与燃料混合的空气流的上游入口。在预混合通道中设置有燃料喷管(12)。在燃料喷管的第轴向位置处设置有至少第燃料喷出孔(40)。在燃料喷管的第二轴向位置处设置有至少第二喷出孔(42)。