| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas turbine combustor 1 capable of achieving complete combustion by fuel pulverization and stably maintaining a flame lift-off condition.SOLUTION: A gas turbine combustor includes: a straight-flow generation unit 6 that generates a straight flow S of air at a center; a swirl-flow generation unit 8 that generates a swirl flow R of the air provided around the straight flow S of the air; and main-fuel supply means 9 that supplies a main fuel along the swirl flow R, the straight-flow generation unit 6, the swirl-flow generation unit 8, and the main-fuel supply means 9 being provided on an upper end of a pre-mixture pipe provided on an upper end of a combustion cylinder 3. A ratio A/Aof an opening area Aof the swirl-flow generation unit 8 to an opening area Aof the straight-flow generation unit 6 is set not less than 0.2 and not more than 1.0. The fuel is pulverized to be completely burned, stable flame lift-off condition can dispense with supply of cooled air in the combustion cylinder 3 and, therefore, avoid emission of unburned components due to a reduction in a flame temperature. As a result, exhaust emission of the invention can achieve lower pollution. |
