| 摘要 |
A fossil fuel/air burner nozzle is provided with a wall (22) at its inlet, in which are apertures (24) which narrow in a direction radially outward of the nozzle. Each aperture is axially aligned with a respective bluff member (18) at the outlet so as to deliver thereto a fuel/air mix flow at a velocity which is graded in said radial direction so as to ensure flame retention on the bluff members (18).
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