Patent ID: 8307656

Claim:
A gas turbine engine comprising: a compressor; a turbine operative to rotate the compressor; and a combustion section operative to provide thermal energy for rotating the turbine; the combustion section comprising: a transition piece having an open, upstream end; a liner having an outer side, an inner side, an upstream end and a downstream end, the outer side being configured to face away from a combustion reaction of the combustion section, the inner side being configured to face the combustion reaction, and the downstream end being received within the open, upstream end of the transition piece such that gas associated with the combustion reaction is directed from the liner, through the transition piece and to the turbine; and a cooling air channel located at the outer side of the liner, the cooling air channel being operative to direct cooling air from the outer side of the liner to the inner side of the liner to cool a portion of the downstream end of the liner obstructed by the transition piece; a barrier wall attached to the outer side of the liner; and a cooling slot formed in the outer side of the liner and in fluid communication with the cooling air channel, the cooling slot extending between at least a portion of the barrier wall and the inner side of the liner.