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US 10,371,051 B2Granted
Gas turbine engine noise reducing nose cone
AssigneeUnited Technologies Corporation
InventorsJonathan Gilson, Nigel David Sawyers-Abbott
Life of this patent
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Abstract
A fan section for a gas turbine engine includes a fan hub and a nose cone section operatively mounted to the fan hub. The nose cone section includes a noise attenuation feature.
Claims7
A fan section for a gas turbine engine comprising;
- a fan hub;
- and
- a nose cone section operatively mounted to the fan hub, the nose cone section including a noise attenuation feature
- comprising a fan nacelle, the nose cone section provided within the fan nacelle, the fan nacelle having an inlet, a fan arranged in a bypass flow path provided by the fan nacelle and rotatable about an axis, the fan having a diameter and a leading edge is axially recessed from the nacelle inlet an inlet length, and a ratio of the inlet length to the diameter of less than about 0.6,
- wherein the noise attenuation feature includes discrete cavities in the nose cone section, providing a noise attenuation characteristic,
- wherein the nose cone section includes a nose cone and the cavities are shaped in part as a neck within the nose cone, each of the cavities being in fluid communication with a secondary cavity, the neck having a smaller area than an adjoining area of the secondary cavity to provide a Helmholz resonator.
3 more elements
Dependencies are inferred from the claim text.