| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel nozzle such as a gas-air premix burner used in a gas turbine. SOLUTION: This gas-air premix burner used for the gas turbine includes a swirler 114 surrounding a bluff center body and an annular burner tube. The bluff center body acts to stabilize a flame by forming recirculation vortex. Cooling air 150 is oriented to impinge upon a bluff face 163 of the center body, spent impingement cooling air flows reverse-directionally toward the air swirler inside the center body to be delivered out through a hole 166 in an outside diameter of the center body, and the spent impingement cooling air reaches a flame zone after mixed with a fuel/air gas mixture. COPYRIGHT: (C)2006,JPO&NCIPI
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