Injection apparatus

Abstract

An injection apparatus is provided and includes an annular base defining an injection hole location and having a protrusion about the injection hole location and a tubular body formed to define an injection hole, the tubular body to be sealably fastened to the annular base and the protrusion at the injection hole location such that the tubular body and the protrusion cooperatively define a plenum such that the plenum is communicative with the injection hole.

1 . An injection apparatus, comprising:
 an annular base defining an injection hole location and having a protrusion about the injection hole location; and   a tubular body formed to define an injection hole, the tubular body to be sealably fastened to the annular base and the protrusion at the injection hole location such that:   the tubular body and the protrusion cooperatively define a plenum, which is communicative with the injection hole.   
     
     
         2 . The injection apparatus according to  claim 1 , wherein the annular base includes an exterior facing surface having a fastening surface formed thereon at the injection hole location. 
     
     
         3 . The injection apparatus according to  claim 1 , further comprising seals disposed between the tubular body and the annular base and between the tubular body and the protrusion. 
     
     
         4 . An injection apparatus for attachment to an outer vessel disposed about an inner vessel formed to define a main flowpath, the injection apparatus comprising:
 an annular base to be fastened to the outer vessel, the annular base defining an injection hole location and having a protrusion about the injection hole location; and   a tubular body formed to define an injection hole, the tubular body to be sealably fastened to the annular base and the protrusion at the injection hole location such that:   the injection hole permits communication between an exterior of the outer vessel and the main flowpath and the tubular body and the protrusion cooperatively define a plenum, which is communicative with the injection hole.   
     
     
         5 . The injection apparatus according to  claim 4 , wherein the outer vessel comprises an impingement sleeve of a turbomachine transition piece. 
     
     
         6 . The injection apparatus according to  claim 4 , wherein the plenum is supplied with fuel and the exterior of the outer vessel comprises compressed air. 
     
     
         7 . The injection apparatus according to  claim 4 , wherein the annular base is fastened to the outer vessel by one or more of bolting, welding, sealing and butt welding. 
     
     
         8 . The injection apparatus according to  claim 4 , wherein the annular base includes an exterior facing surface having a fastening surface formed thereon at the injection hole location. 
     
     
         9 . The injection apparatus according to  claim 4 , further comprising support structures to support the annular base on the inner vessel. 
     
     
         10 . The injection apparatus according to  claim 4 , further comprising seals disposed between the tubular body and the annular base and between the tubular body and the protrusion. 
     
     
         11 . An injection apparatus for attachment to an outer vessel disposed about an inner vessel formed to define a main flowpath, the injection apparatus comprising:
 an annular base to be fastened to the outer vessel, the annular base defining injection hole locations and having protrusions about the injection hole locations; and   tubular bodies each formed to define an injection hole and each to be sealably fastened to the annular base and the protrusions at each injection hole location such that at each injection hole location:   the corresponding one of the injection holes permits communication between an exterior of the outer vessel and the main flowpath and the corresponding one of the tubular bodies and the corresponding one of the protrusions cooperatively define a plenum,   the corresponding one of the tubular bodies being further formed to define additional injection holes for communication between the plenum and the injection hole.   
     
     
         12 . The injection apparatus according to  claim 11 , wherein the outer vessel comprises an impingement sleeve of a turbomachine transition piece. 
     
     
         13 . The injection apparatus according to  claim 11 , wherein the plenum is supplied with fuel and the exterior of the outer vessel comprises compressed air. 
     
     
         14 . The injection apparatus according to  claim 11 , wherein the annular base is fastened to the outer vessel by one or more of bolting, welding, sealing and butt welding. 
     
     
         15 . The injection apparatus according to  claim 11 , wherein the annular base includes an exterior facing surface having a fastening surface formed thereon at the injection hole location. 
     
     
         16 . The injection apparatus according to  claim 11 , further comprising support structures to support the annular base on the inner vessel. 
     
     
         17 . The injection apparatus according to  claim 11 , further comprising seals disposed between the tubular bodies and the annular base and between the tubular bodies and the protrusions. 
     
     
         18 . The injection apparatus according to  claim 11 , wherein the injection hole locations are non-uniformly separated from one another. 
     
     
         19 . The injection apparatus according to  claim 11 , wherein the injection hole locations are clustered. 
     
     
         20 . The injection apparatus according to  claim 11 , wherein the additional injection holes for each corresponding tubular body are arrayed about a circumference of the injection hole defined by the corresponding tubular body.