Flange cooled turbine nozzle
First Claim
Patent Images
1. A turbine nozzle comprising:
- outer and inner bands bounding a row of vanes extending axially between leading and trailing edges;
said outer band including an imperforate aft flange disposed above said trailing edges, with an undercut pocket in a root of said flange, said pocket extending axially aft from a forward face of said aft flange, and being contiguous with an outer surface of said outer band; and
an impingement baffle bridging said outer band and aft flange at said root to cover said pocket, and including a row of impingement holes facing said pocket.
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Abstract
A turbine nozzle includes outer and inner bands bounding nozzle vanes. The outer band includes an aft flange. An impingement baffle bridges the outer band and aft flange at the root thereof to provide impingement cooling.
58 Citations
20 Claims
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1. A turbine nozzle comprising:
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outer and inner bands bounding a row of vanes extending axially between leading and trailing edges; said outer band including an imperforate aft flange disposed above said trailing edges, with an undercut pocket in a root of said flange, said pocket extending axially aft from a forward face of said aft flange, and being contiguous with an outer surface of said outer band; and an impingement baffle bridging said outer band and aft flange at said root to cover said pocket, and including a row of impingement holes facing said pocket. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A turbine nozzle comprising:
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radially outer and inner bands joined to opposite ends of vanes; each vane including axially opposite leading and trailing edges and circumferentially opposite pressure and suction sides extending radially between said bands; said outer band including an imperforate aft flange extending radially outwardly above said trailing edges; said aft flange having a radially inner root joining said outer band, and an opposite, radially outer seat for receiving a seal, wherein said aft flange further includes an undercut pocket in said root of said aft flange, said pocket extending axially aft from a forward face of said flange, and being contiguous with an outer surface of said outer band; an impingement baffle bridging said outer band and aft flange at said root with a row of impingement holes facing said root; and a row of outlet holes extending through said outer band forward of said root in flow communication with said impingement holes for discharging spent impingement air. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification