Exhaust gas diffuser

Abstract

An exhaust gas diffuser includes a center body having an inlet adapted for coupling to a gas turbine, an outer wall, an inner wall and an end downstream from the inlet. The inner wall forms a continuous curve from an entry location to the end. The diffuser also includes a second portion coupled to the end of the of center body.

1 . A center body for an exhaust gas diffuser, the center body comprising:
 an outer wall; and   an inner wall spaced apart from the outer wall, the inner wall forming a continuous curve between an entry location and an end of the center body.   
     
     
         2 . The center body of  claim 1 , comprising:
 one or more struts coupled between the inner wall and the outer wall.   
     
     
         3 . The center body of  claim 2 , wherein the entry location is upstream of the one or more struts and the end is downstream of the struts. 
     
     
         4 . The center body of  claim 1 , wherein the outer wall includes a curved portion extending from an inlet to a location downstream of the inlet. 
     
     
         5 . The center body of  claim 1 , in combination with a second portion having an entry side wall connected to a second portion inner wall by a curved portion. 
     
     
         6 . The center body of  claim 1 , in combination with a gas turbine. 
     
     
         7 . An exhaust gas diffuser comprising:
 a center body having an inlet adapted for coupling to a gas turbine, the center body having an outer wall, an inner wall and an end downstream from the inlet, the inner wall forming a continuous curve from an entry location to the end; and   a second portion coupled to the end of the of center body.   
     
     
         8 . The exhaust gas diffuser of  claim 7 , in combination with a gas turbine. 
     
     
         9 . The exhaust gas diffuser of  claim 7 , wherein the outer wall forms a curve from the inlet to a location downstream of the inlet. 
     
     
         10 . The exhaust gas diffuser of  claim 7 , wherein the center body includes a recess within the inner wall for receiving a rotor. 
     
     
         11 . The exhaust gas diffuser of  claim 7 , further comprising:
 one or more struts coupling the inner wall to the outer wall.   
     
     
         12 . The exhaust gas diffuser of  claim 11 , wherein the entry location is upstream of the one or more struts. 
     
     
         13 . The exhaust gas diffuser of  claim 7 , wherein second portion includes an entry side wall and a second portion inner wall connected to the entry side wall by a curved portion. 
     
     
         14 . The exhaust gas diffuser of  claim 13 , wherein the curved portion contacts the inner wall at the end of the inner wall. 
     
     
         15 . The exhaust gas diffuser of  claim 14 , wherein the outer wall forms a curve from the inlet to a location downstream of the inlet. 
     
     
         16 . A gas turbine comprising:
 a turbine casing that surrounds a portion of the gas turbine; and   an exhaust gas diffuser coupled to the turbine casing, the diffuser including:   a center body having an inlet adapted for coupling to a gas turbine, the center body having an outer wall, an inner wall and an end downstream from the inlet, the inner wall forming a continuous curve from an entry location to the end.   
     
     
         17 . The gas turbine of  claim 16 , wherein the diffuser further includes:
 a second portion coupled to the end of the of center body.   
     
     
         18 . The gas turbine of  claim 16 , wherein the diffuser further includes one or more struts coupled between the inner wall and the outer wall and the entry location is upstream of the one or more struts. 
     
     
         19 . The gas turbine of  claim 16 , wherein the outer wall includes a curved portion extending from an inlet to a location downstream of the inlet. 
     
     
         20 . The gas turbine of  claim 16 , in combination with a second portion having an entry side wall connected to a second portion inner wall by a curved portion.