| 摘要 |
PURPOSE:To reduce the combustion maximum temperature at a shoulder part of a liner of a combustor by a method wherein several water injection holes opened to the main swirlor are provided at an upstream side of nozzle at the extremity end of a water passage in a water injection device. CONSTITUTION:A water injection device 16 is concentrically arranged with a fuel injection device 7, an extremity end of a water passage 18 is applied as a nozzle 19, water drips are sprayed from the nozzle 19 into combustion gas within an atomization cone 11 so as to cause the maximum temperature of the combustion gas at an outer end side A of the atomization cone 11 in the conventional manner. Further, several water injection holes 20 are made in a radial direction of the liner 12 of the combustion unit facing against the upstream side main swirlor of the nozzle 10 are formed water drips are injected toward the main swirlor 15, mixed with combustion air circulated by the main swirlor 15 to decrease the maximum temperature of the combustion gas near the shoulder B of the curved part of the liner 12 of the combustion unit. With this arrangement, occurrence of NOx at the outer end A and the shoulder part B generating a high temperature is reduced.
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