TRANSITION DUCT FOR A GAS TURBINE PLANT AND GAS TURBINE PLANT COMPRISING SAID TRANSITION DUCT

A gas turbine transition duct (10) comprising:a tubular body (25) having an upstream end (28) configured to be coupled to a combustor (9) and a downstream end (20) configured to be coupled to a turbine (5); the tubular body (25) comprising:an outer wall (30);an inner wall (31) defining a transition channel (33);at least one first convective cooling channel (40) arranged between the inner wall (31) and the outer wall (30) having at least one first inlet (46; 50) made in the outer wall (30) between the upstream end (28) and the downstream end (29); the first convective cooling channel (40) comprising at least one inlet portion (43; 48) comprising the first inlet (46; 50), a main portion (44) and at least one bent portion (45; 49) arranged between the inlet portion (43; 48) and the main portion (44).