Nosecone for a ducted fan gas turbine engine
AssigneeROLLS-ROYCE plc
InventorsAnastasios KOVANIS, Andrew MEKERESZ, Ewan F. THOMPSON
Life of this patent
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Abstract
A nosecone for a ducted fan gas turbine engine is shown. The nosecone includes a body with an outer surface that tapers in axial extent from an apex to a base of the body, the apex defining a position of 0 percent axial extent and the base defining a position of 100 percent axial extent, and in which the outer surface includes a plurality of undulations extending between a first location on the outer surface and a second location on the outer surface, wherein the first location is positioned at from 0 to 50 percent of axial extent and the second location is positioned at from 85 to 100 percent of axial extent.
Claims21
1-20. (canceled)
A nosecone for a ducted fan gas turbine engine, the nosecone comprising a body with an outer surface that tapers in axial extent from an apex to a base of the body, the apex defining a position of 0 percent axial extent and the base defining a position of 100 percent axial extent, and in which the outer surface comprises a plurality of undulations extending between a first location on the outer surface and a second location on the outer surface, wherein the first location is positioned at from 0 to 50 percent of axial extent and the second location is positioned at from 85 to 100 percent of axial extent.
A fan assembly for a ducted fan gas turbine engine, comprising:
- a hub with a plurality of fan blades mounted thereto;
- a nosecone mounted to the hub comprising a body with an outer surface that tapers in axial extent from an apex to a base of the body, the apex defining a position of 0 percent axial extent and the base defining a position of 100 percent axial extent, and in which the outer surface comprises a plurality of undulations extending between a first location on the outer surface and a second location on the outer surface, wherein the first location is positioned at from 0 to 50 percent of axial extent and the second location is positioned at from 85 to 100 percent of axial extent.
A nosecone for a ducted fan gas turbine engine, the nosecone comprising a body with an outer surface that tapers in axial extent from an apex to a base of the body, the apex defining a position of 0 percent axial extent and the base defining a position of 100 percent axial extent, and in which the outer surface comprises a plurality of undulations having an axial extent of from 35 to 100 percent of the axial extent of the body, and wherein each of the plurality of undulations extends circumferentially between a first peak and a second peak with a trough therebetween, wherein the first peak and the second peak both have a hyperbolic axial profile defined between the first location and the second location.
Dependencies are inferred from the claim text.