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Aerofoil for an axial flow turbomachine

  • US 20020197156A1
  • Filed: 01/11/2002
  • Published: 12/26/2002
  • Est. Priority Date: 02/17/2000
  • Status: Active Grant
First Claim
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1. A turbine stator vane (41) for use in a ring of similar vanes arranged in an axial flow turbine having an annular path for a turbine working fluid, the vane comprising an aerofoil spanning the annular path and having a radially inner platform region (45), a radially outer tip region (46), an axially forward leading edge (44) and an axially rearward trailing edge (43), the aerofoil having a pressure surface (47) and a suction surface (42) which, are respectively convex and concave between the platform region (45) and the tip region (46) in a plane (48) extending both radially of the annular path and transversely of the axial direction, the trailing edge (43) of the aerofoil being straight from the platform region to the tip region and oriented radially of the annular path, and said convex and concave curvatures of the aerofoil pressure and suction surfaces being achieved by rotational displacement of the aerofoil sections about the straight trailing edge, the axial width (W) of the aerofoil being substantially constant over substantially all of the aerofoil radial height and the chord line at mid-height aerofoil sections (44) being shorter than the chord lines in aerofoil sections at platform or tip regions.

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