F - Mech Eng,Light,Heat,Weapons – 23 – R
Patent
F - Mech Eng,Light,Heat,Weapons
23
R
F23R 3/16 (2006.01) F23D 14/74 (2006.01) F23D 14/78 (2006.01) F23R 3/28 (2006.01)
Patent
CA 2394118
A gas turbine combustor is improved to enhance a cooling effect and a flame holding ability to thereby reduce NOx generation. A combustor 13 comprises a double structure of an inner cylindrical member 13a and an enlarged outer cylindrical member 13b to thereby enlarge a diameter of a combustion zone. A pre-mixing nozzle 11 comprises an outer sleeve 23 of which front end is projected beyond a base plate 17 and a pre-mixing nozzle portion 21 of the inner side. Air flows between the outer sleeve 23 and the pre-mixing nozzle portion 21 for enhancing the cooling effect of the pre-mixing nozzle 11. High temperature gas inner and outer circulating flows 15, 16 are formed in the combustion zone to enhance the flame holding ability. Pilot fuel quantity, as so far necessitated for flame holding, is reduced and NOx quantity generated of the pilot fuel is reduced. The base plate 17 exposed to the high temperature gas is prevented from being overheated by the projected front portion of the pre-mixing nozzle 11.
Akizuki Wataru
Mandai Shigemi
Saitoh Keijirou
Tanaka Katsunori
Mitsubishi Heavy Industries Ltd.
Riches Mckenzie & Herbert Llp
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