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Closed or open air cooling circuits for nozzle segments with wheelspace purge

  • US 5,591,002 A
  • Filed: 08/01/1995
  • Issued: 01/07/1997
  • Est. Priority Date: 08/23/1994
  • Status: Expired due to Fees
First Claim
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1. An open circuit air-cooled stator vane segment comprising:

  • inner and outer walls spaced from one another;

    a vane extending between said inner and outer walls and having leading and trailing edges, said vane including discrete leading edge, trailing edge and intermediate cavities between the leading and trailing edges and extending radially of said vane, first and second air inlets for supplying cooling air to said leading edge and trailing edge cavities, respectively;

    an insert in said leading edge cavity for receiving cooling air from said first air inlet and having impingement openings for directing the cooling air against interior wall surfaces of said leading edge cavity for impingement cooling of the vane about said leading edge cavity;

    an insert in said trailing edge cavity for receiving cooling air from said second air inlet and having impingement openings for directing the cooling air against interior wall surfaces of said vane for impingement cooling of said vane about said trailing edge cavity;

    said trailing edge cavity having openings for delivery of cooling air through the trailing edge of said vane; and

    an insert in said intermediate cavity having an air inlet adjacent said outer wall and an outlet adjacent said inner wall, said intermediate insert having an internal passage dedicated for supplying cooling air radially inwardly from said inlet to said outlet and into a wheelspace between adjacent turbine stages.

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