Patent ID: 8528340

Claim:
A flow sleeve for use in a turbine engine comprising a compressor section, a combustion section, and a turbine section downstream from the combustion section, the flow sleeve comprising: a sleeve wall defining a pre-mixing passage where fuel is mixed with air before entering a combustion chamber defined by a liner of the combustion section, the pre-mixing passage being defined between the liner and the sleeve wall with the sleeve wall being located radially outwardly from the liner, the sleeve wall having a forward end proximate to a cover plate of the combustion section and an opposed aft end, said sleeve wall comprising; a first wall section extending axially from said sleeve wall forward end; and a second wall section extending from said first wall section between said forward and aft ends of said sleeve wall toward said aft end of said sleeve wall, wherein a cavity is formed between said first wall section and said second wall section; and a cover structure located at least partially forward of said second wall section and affixed to a radially inner surface of said sleeve wall and housing a fuel supply tube in fluid communication with a source of fuel for delivering fuel from said source of fuel to said pre-mixing passage.