초록

Gas turbine engines in which provision is made for introducing a liquid coolant into the combustor of the engine. This reduces the flame temperature in the combustor, thereby discouraging the formation of thermal NOx.

대표청구항 ▼

Combustion apparatus comprising the combination of: a combustor in which liquid fuel can be burned and means for reducing the emission of nitrogen oxides from said combustor, said last-mentioned means comprising means for; introducing a liquid coolant and the liquid fuel into said combustor; there m

Combustion apparatus comprising the combination of: a combustor in which liquid fuel can be burned and means for reducing the emission of nitrogen oxides from said combustor, said last-mentioned means comprising means for; introducing a liquid coolant and the liquid fuel into said combustor; there mixing said coolant with said fuel; atomizing the fuel and coolant and forming a uniform mixture of fuel, coolant, and combustion air as the mixture enters the primary combustion zone in said combustor, said means for introducing a liquid coolant and the liquid fuel into said combustor comprising at least one fuel injection nozzle for introducing the liquid fuel into the combustor and means for introducing said liquid coolant into said combustor through said fuel injection nozzle, said fuel injection nozzle comprising a body having a centrally disposed combustion air passage extending through and opening onto one end thereof and an annular liquid fuel passage concentrically surrounding said air passage and opening onto the same end of the nozzle as said combustion air passage; said combustor further comprising means for introducing the liquid fuel into said annular passage; means for introducing the liquid coolant into the combustion air passage, and means for forming said liquid coolant into a film on the wall of said combustion air passage comprising means for introducing air into said centrally disposed passage and means for imparting a swirl to the air in said centrally disposed passage, thereby promoting the uniform mixing of said coolant and said fuel as they are discharged from said one end of said fuel injection nozzle.