| 摘要 |
A fuel nozzle assembly 100 has a center body 102 having a pilot air passage 142 and a pilot fuel passage 144 defined therein. A pilot nozzle 106 having a plurality of premix passages 134 is disposed within a downstream end portion 108 of the center body. Each premix passage has an inlet 136 that is in fluid communication with the pilot air passage, an outlet 138 that is positioned axially downstream from the inlet and a fuel port 140 that is in fluid communication with the pilot fuel passage. An outer sleeve 110 can be coaxially aligned with and radially spaced from the center body so as to define an annular passage 112 therebetween. A strut 114 extends radially outwardly from the center body to the outer sleeve. The fuel nozzle assembly can further include an inlet passage that is in fluid communication with the pilot air passage. The inlet passage extends through the outer sleeve, the strut and the center body to provide a flow (164 Fig 4) of pilot air into the pilot air passage. The pilot air passage and the pilot fuel passage can both be annular. |
