| 摘要 |
A combustion process for burning fuel in a combustion chamber 7 comprises the steps of: supplying fuel and air to a burner 1 associated with the combustion chamber, the amount ofair supplied being at least as much as required for stoichiometric combustion of the fuel and subsequent dilution of the combustion process in the combustion chamber; and injecting the fuel and all the air from the burner directly into the combustion chamber in a substantially unmixed state as a fuel stream within an air stream. Fuel is injected from a nozzle 4, which is nested within an air nozzle 12. Preferably, the fuel nozzle exitis set back within the air nozzle opening. The fuel nozzle ejects a fuel stream of such thickness d that the fuel burns in the combustion chamber 7 as a diffusion flame with a high surface-to-volume ratio at or close to the stoichiometric fuel/air ratio. The flow ofair through the air nozzle 12 is subject to the venturi effect, which increases the speed of the air stream and exerts a suction effect on the fuel. The combustion process can be performed in burners and combustors that take many different forms. |
