Fuel injection assembly for use in turbine engines and method of assembling same

A turbine engine, said turbine engine comprising:

• a compressor;
• a combustion assembly coupled downstream from said compressor, wherein said combustion assembly comprises at least one combustor comprising a fuel injection assembly comprising:
• a plurality of tube assemblies wherein each of said plurality of tube assemblies comprises an upstream portion and a downstream portion, each of said plurality of tube assemblies further comprises a plurality of tubes that extend from one of said upstream portion to said downstream portion and said upstream portion through said downstream portion;
• and
• at least one injection system coupled to at least one tube assembly of said plurality of tube assemblies, wherein said at least one injection system comprises a fluid supply member that extends from a fluid source to said downstream portion of said at least one tube assembly, said fluid supply member comprises a first end portion located in said downstream portion of said at least one tube assembly, wherein said first end portion comprises at least one first opening for channeling fluid through said at least one tube assembly to facilitate reducing a temperature therein, and wherein said first end portion further comprises one of the following:
• (i) an upstream surface and a downstream surface, said downstream surface has a substantially concave shape, said at least one first opening extends from said downstream surface to said upstream surface;
• and
• (ii) an upstream portion and a downstream portion coupled to said upstream portion such that a channel is defined therebetween, wherein said first end portion comprises at least one second opening that extends through said upstream portion of said first end portion, said at least one first opening extends through said downstream portion of said first end portion.

A method for assembling a fuel injection assembly for use with a turbine engine, said method comprising:

• coupling a plurality of tube assemblies within a combustor, wherein each of said plurality of tube assemblies includes an upstream portion and a downstream portion, each of the plurality of tube assemblies includes a plurality of tubes that extend from one of said upstream portion to said downstream portion and said upstream portion through said downstream portion;
• and
• coupling at least one injection system to at least one tube assembly of the plurality of tube assemblies, wherein the at least one injection system includes a fluid supply member that extends from a fluid source to the downstream portion of the at least one tube assembly, the fluid supply member includes a first end portion that is located in the downstream portion of the at least one tube assembly, wherein the first end portion includes at least one first opening for channeling fluid through the at least one tube assembly to facilitate reducing a temperature therein, and wherein the fluid supply member includes one of the following:
• (i) a first end portion that includes an upstream surface and a downstream surface, the downstream surface has a substantially concave shape, the at least one first opening extends from the downstream surface to the upstream surface;
• and
• (ii) a first end portion that includes an upstream portion and a downstream portion that is coupled to the upstream portion such that a channel is defined therebetween, the first end portion includes at least one second opening that extends through the upstream portion of the first end portion and the at least one first opening extends through the downstream portion of the first end portion.