Compressor impeller thickness profile with localized thick spot
AssigneeGeneral Motors Corporation
InventorYousef M. Jarrah
Life of this patent
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Abstract
An air foil includes a leading edge, a trailing edge, a hub contour, and a tip contour, whereby the hub contour and tip contour extend between the leading and trailing edges to define a blade surface therebetween. A localized thick spot is disposed between the leading edge and the trailing edge and extends from a first point on the hub contour to a second point on the tip contour. The localized thick spot includes a generally sheared profile and is operable to provide the air foil with a desired strength while concurrently providing desired aerodynamic properties.
Claims18
An airfoil of an impeller having a hub portion, comprising:
- a leading edge;
- a trailing edge;
- a hub contour extending along the hub portion;
- a tip contour;
- and
- a localized thick spot disposed between said leading edge and said trailing edge, said thick spot extending from a first point on said hub contour to a second point on said tip contour,
- wherein said first point is disposed a distance at or between 8–12% of a total length of the airfoil from said leading edge.
An airfoil of an impeller including a hub portion and an axis of rotation, the airfoil corn p rising:
- a leading edge disposed adjacent to the axis of rotation of the impeller and in contact with the hub portion along an entire length of said leading edge;
- a trailing edge disposed at an opposite end of the airfoil from said leading edge;
- a hub contour extending along a length of the airfoil between said leading edge and said trailing edge;
- a tip contour spaced apart from said hub contour and extending along a length of the airfoil between said leading edge and said trailing edge;
- and
- a localized thick spot disposed between said leading edge and said trailing edge and extending from a first point on said hub contour to a second point on said tip contour.
An airfoil of an impeller having a hub portion, the airfoil comprising:
- a mean axis extending along a length of the airfoil;
- a leading edge disposed adjacent to the;
- a trailing edge disposed at an opposite end of the airfoil from said leading edge;
- a hub contour extending along the hub portion between said leading edge and said trailing edge;
- a tip contour spaced apart from said hub contour and extending between said leading edge and said trailing edge;
- and
- a localized thick spot disposed between said leading edge and said trailing edge and extending from a first point on said hub contour to a second point on said tip contour and formed at an angle relative to said mean axis of the airfoil;
- wherein said second point is disposed at a distance at or between 28–32% of a total length of the tip contour of the airfoil from said leading edge.
Dependencies are inferred from the claim text.