TRANSITION DUCT FOR GAS TURBINE

摘要

PROBLEM TO BE SOLVED: To provide a transition duct that includes a heat shield to shield at least a portion of a frame downstream end from hot gas so that frame temperature and thermal stress of the gas turbine combustor transition duct can be reduced and the need for a machined cooling passage can be reduced or eliminated.SOLUTION: A frame 50 of the transition duct includes: a downstream end 54; a radially outer portion 60; a radially inner portion 58 opposed to the radially outer portion 60; a first side portion 62 between the radially outer portion 60 and the radially inner portion 58; and a second side portion 64 opposed to the first side portion 62. A slot 66 in the first side portion 62 of the frame 50 has a downstream surface adjacent to the downstream end 54 of the frame 50. A heat shield 72 having an inner surface, an outer surface 76 and a plurality of spacers extends outward from the inner surface of a heat shield 72 such that the inner surface is adjacent to the slot downstream surface of the slot 66 and the downstream end 54 of the frame 50.