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Cooling arrangement

  • US 8,240,994 B2
  • Filed: 04/28/2008
  • Issued: 08/14/2012
  • Est. Priority Date: 05/18/2007
  • Status: Active Grant
First Claim
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1. An aerofoil for a gas turbine engine comprising:

  • a pressure wall and a suction wall, together defining leading and trailing edges and a passage into which is supplied a cooling fluid, at least one wall of the pressure wall and suction wall having an interior surface and exterior surface, and defining an array of cooling holes to allow the cooling fluid to flow from the interior surface to the exterior surface, the array of holes defining a first group and a second group, the holes of the first group are angled to intersect the holes of the second group, wherein the holes of at least one of the groups include two or more holes positioned at different angles to one another to vary a porosity of the at least one wall dependent on a varying temperature profile.

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