Fan root endwall contouring
AssigneeUnited Technologies Corporation
InventorJeff M. Carrico
Life of this patent
Estimating the term…
Abstract
A turbomachine includes an endwall with a plurality of circumferentially spaced apart, radially extending blades extending from the endwall. A first one of the blades defines a pressure surface of a flow channel, a second one of the blades defines a suction surface of the flow channel, and the endwall defines an inner surface of the flow channel. The endwall includes a radially raised portion that is raised proximate the suction surface, and a radially depressed portion downstream of the raised portion.
Claims16
A turbomachine comprising:
- an endwall with a plurality of circumferentially spaced apart, radially extending blades extending from the endwall, wherein a first one of the blades defines a pressure surface of a flow channel, a second one of the blades defines a suction surface of the flow channel, and the endwall defines an inner surface of the flow channel, and wherein the endwall includes a radially raised portion that is raised proximate the suction surface, a radially depressed portion having a majority located downstream of a majority of the raised portion, and a radially neutral portion that directly extends from the pressure surface to a midway point between the pressure surface and the suction surface circumferentially, wherein the depressed portion extends axially through the flow channel from an outlet of the channel defined by trailing edges of the blades to a point over half of the way upstream toward an inlet defined by leading edges of the blades.
A fan assembly for a turbofan comprising:
- a blade portion and a pair of opposed endwall portions extending laterally from the blade portion, wherein each endwall portion is configured to form an endwall with a circumferentially adjacent endwall portion, wherein the endwall defines an inner surface of a flow channel, and wherein the endwall includes a radially raised portion that is raised proximate a suction surface of the flow channel, a radially depressed portion having a majority located downstream of a majority of the raised portion, and a radially neutral portion that directly extends from a pressure surface to a midway point between the pressure surface and the suction surface circumferentially, wherein the depressed portion extends axially through the flow channel from an outlet of the channel defined by trailing edges of adjacent blades to a point over half of the way upstream toward an inlet defined by leading edges of the blades.
An endwall segment for fan assembly of a turbofan comprising:
- an endwall segment body defining an inner surface of a respective flow channel, wherein the inner surface of the endwall segment body includes a radially raised portion that is raised proximate a respective suction surface of the endwall segment body, a radially depressed portion having a majority located downstream of a majority of the raised portion, and a radially neutral portion that directly extends from the respective pressure surface to a midway point between the respective pressure surface and the respective suction surface circumferentially, wherein the depressed portion extends axially from an outlet portion of the endwall segment body to a point over half of the way upstream toward an inlet portion of the endwall segment body opposed to the outlet portion.
Dependencies are inferred from the claim text.