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US 9,175,567 B2Granted
Low loss airfoil platform trailing edge
AssigneeUnited Technologies Corporation
InventorsAndrew S. Aggarwala, Thomas J. Praisner
Life of this patent
Estimating the term…
Abstract
An airfoil platform comprises a leading edge portion and a trailing edge portion. The trailing edge portion comprises a first region having a convex flowpath contour, a second region having an intermediate flowpath contour extending downstream from the convex flowpath contour, and a third region having a concave or linear flowpath contour extending downstream from the intermediate flowpath contour to a downstream end of the trailing edge portion of the platform.
Claims25
An airfoil with a platform, the platform comprising:
- a leading edge portion;
- and
- a trailing edge portion aft of a trailing edge of the airfoil, the trailing edge portion comprising:
- a first region having a convex flowpath contour that begins aft of the trailing edge of the airfoil;
- a second region having an intermediate flowpath contour extending downstream from the convex flowpath contour;
- and
- a third region having a concave or linear flowpath contour extending downstream from the intermediate flowpath contour to a downstream end of the trailing edge portion.
4 more elements
An airfoil comprising:
- pressure and suction surfaces extending axially from a leading edge to a trailing edge and radially from an inner section to an outer section;
- and
- a platform adjacent the inner section, the platform having a trailing edge section with a contoured flowpath aft of the trailing edge, the contoured flowpath comprising:
- an upstream region with a convex contour that begins aft of the trailing edge of the airfoil;
- an intermediate region with a continuous contour extending downstream from the convex contour of the upstream region;
- and
- a downstream region with a concave or linear contour extending from the intermediate region to a downstream end of the platform.
4 more elements
An airfoil comprising:
- pressure and suction surfaces extending axially from a leading edge to a trailing edge and radially from an inner section to an outer section;
- an outer diameter platform adjacent the outer section;
- and
- an inner diameter platform adjacent the inner section, the inner diameter platform having a leading edge portion and a trailing edge portion, the trailing edge portion beginning aft of the trailing edge and comprising:
- an upstream flowpath region having a convex contour;
- a downstream flowpath region having a concave or linear contour;
- and
- an intermediate flowpath region extending between the upstream flowpath region and the downstream flowpath region, the intermediate flowpath region having a first slope matching the convex contour of the upstream flowpath region and a second slope matching the concave or linear contour of the downstream flowpath region.
5 more elements
Dependencies are inferred from the claim text.