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Effusion cooled transition duct

  • US 6,568,187 B1
  • Filed: 12/10/2001
  • Issued: 05/27/2003
  • Est. Priority Date: 12/10/2001
  • Status: Expired due to Term
First Claim
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1. An effusion cooled transition duct for transferring hot gases from a combustor to a turbine comprising:

  • a panel assembly comprising;

    a first panel formed from a single sheet of metal;

    a second panel formed from a single sheet of metal;

    said first panel fixed to said second panel by a means such as welding thereby forming a duct having an inner wall, an outer wall, a thickness therebetween said walls, a generally cylindrical inlet end, and a generally rectangular exit end, said inlet end defining a first plane, said exit end defining a second plane, said first plane oriented at an angle relative to said second plane;

    a generally cylindrical inlet sleeve having an inner diameter and outer diameter, said inlet sleeve fixed to said inlet end of said panel assembly;

    a generally rectangular aft end frame, said frame fixed to said exit end of said panel assembly;

    a plurality of cooling holes in said panel assembly, each of said cooling holes having a diameter D and separated from the closest adjacent one of said cooling holes by a distance of at least P in the axial and transverse directions, said cooling holes extending from said outer wall to said inner wall, and oriented at an acute angle β

    relative to said outer wall at the location of where said cooling hole penetrates said outer wall.

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