Patent ID: 8353165

Claim:
A combustor assembly comprising: a combustor liner defining a combustion chamber there within; a transition piece comprising a forward portion coupled to said combustion liner and an aft portion extending from said forward portion, said aft portion comprising a transition piece frame, said transition piece frame comprising: an upstream surface, a downstream surface, and a radially inner surface extending between said upstream and downstream surfaces, said radially inner surface comprises a leading edge extending between said radially inner surface and said upstream surface; and a plurality of first cooling passages extending from said upstream surface to said downstream surface, each of said first cooling passages oriented obliquely with respect to said leading edge from the upstream surface towards the downstream surface; and an impingement sleeve coupled to the transition piece frame and defining at least one transition piece cooling passage extending between the transition piece and the impingement sleeve, the at least one transition piece cooling passage is coupled in flow communication with said plurality of first cooling passages.