Turbine exhaust diffuser system manways

Abstract

A turbine exhaust diffuser system includes a plurality of manways. The plurality of manways each extend between an outer wall of the turbine exhaust diffuser system and an interior access tunnel of the turbine exhaust diffuser system. The plurality of manways extend between the outer wall and the access tunnel at an angle that is not perpendicular to a central axis of the turbine exhaust diffuser system.

1 . A turbine exhaust diffuser system, comprising:
 an outer wall;   an inner wall formed by a converging inner passageway, wherein turbine exhaust is configured to flow through an area between the outer wall and the inner wall; and   a first manway extending from the outer wall to the inner wall, wherein the first manway extends from the outer wall to the inner wall at an angle that is not perpendicular to a central axis of the turbine exhaust diffuser system.   
     
     
         2 . The turbine exhaust diffuser system of  claim 1 , wherein the angle between the first manway and the central axis is greater than approximately 95 degrees. 
     
     
         3 . The turbine exhaust diffuser system of  claim 1 , wherein the angle between the first manway and the central axis is between approximately 100 and approximately 115 degrees. 
     
     
         4 . The turbine exhaust diffuser system of  claim 1 , comprising a second manway extending from the outer wall to the inner wall, wherein the second manway extends from the outer wall to the inner wall at an angle that is not perpendicular to the central axis of the turbine exhaust system. 
     
     
         5 . The turbine exhaust diffuser system of  claim 4 , comprising a third manway extending from the outer wall to the inner wall, wherein the third manway extends from the outer wall to the inner wall at an angle that is not perpendicular to the central axis of the turbine exhaust system. 
     
     
         6 . The turbine exhaust diffuser system of  claim 5 , wherein the angles between the first, second, and third manways and the central axis are between approximately 95 and approximately 115 degrees. 
     
     
         7 . The turbine exhaust diffuser system of  claim 4 , wherein the second manway comprises pipes for providing lubricating fluid to a turbine. 
     
     
         8 . The turbine exhaust diffuser system of  claim 5 , wherein the third manway comprises pipes for providing cooling fluid to a turbine. 
     
     
         9 . The turbine exhaust diffuser system of  claim 1 , wherein the converging passageway is configured to allow an operator to enter the converging passageway through an access door and move within the converging passage. 
     
     
         10 . A turbine exhaust diffuser system, comprising:
 an outer wall of a turbine exhaust passageway;   an access passageway defined by an inner wall of the turbine exhaust passageway, wherein the access passageway is configured to enable an operator to enter the access passageway to perform maintenance on the turbine exhaust diffuser system; and   a plurality of manways extending from the outer wall of the turbine exhaust passageway to the access passageway, wherein each manway extends from the outer wall of the turbine exhaust passageway to the access passageway at an angle that is not perpendicular to a central axis of the turbine exhaust diffuser system.   
     
     
         11 . The turbine exhaust diffuser system of  claim 10 , wherein the angle between each manway and the central axis is greater than 95 degrees. 
     
     
         12 . The turbine exhaust diffuser system of  claim 10 , wherein the angle between each manway and the central axis is between 100 and 115 degrees. 
     
     
         13 . The turbine exhaust diffuser system of  claim 10 , wherein the access passageway comprises a conical shape having a smaller interior diameter toward a downstream end of the access passageway. 
     
     
         14 . The turbine exhaust diffuser system of  claim 10 , wherein the plurality of manways comprises a first manway, a second manway, and a third manway. 
     
     
         15 . A turbine exhaust diffuser system, comprising:
 a plurality of manways extending between an outer wall and an interior access tunnel at an angle that is not perpendicular to a central axis of the turbine exhaust diffuser system.   
     
     
         16 . The turbine exhaust diffuser system of  claim 15 , wherein the angle between each of the plurality of manways and the central axis is greater than 95 degrees. 
     
     
         17 . The turbine exhaust diffuser system of  claim 15 , wherein the angle between each of the plurality of manways and the central axis is between 100 and 115 degrees. 
     
     
         18 . The turbine exhaust diffuser system of  claim 15 , wherein each of the plurality of manways comprises an upstream end and a downstream end, the manway forming a first angle between the upstream end and the central axis and a second angle between the downstream end and the central axis. 
     
     
         19 . The turbine exhaust diffuser system of  claim 18 , wherein the first angle is greater than the second angle. 
     
     
         20 . The turbine exhaust diffuser system of  claim 18 , wherein the first angle is between 95 and 110 degrees and the second angle is between 70 and 85 degrees.