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US 10,294,815 B2Granted
SPF/DB structure for attenuation of noise from air flow
AssigneeThe Boeing Company
InventorsMax R. Runyan, Daniel G. Sanders, Larry D. Hefti, David R. Papenfuss, Jack W. Mauldin, Luis R. Leon
Life of this patent
Estimating the term…
Abstract
A propulsion system comprises a turbine engine, and an engine nacelle including an SPF/DB inner wall having a hot side face sheet against the engine and a cold side face sheet that has noise attenuation openings.
Claims20
A propulsion system comprising:
- a turbine jet engine;
- and
- an engine nacelle including a cowling for the turbine jet engine, the cowling formed exclusively from an SPF/DB inner wall having a hot side face sheet directly adjacent to and positioned against an engine core of the turbine jet engine and a cold side face sheet spaced radially exterior to the hot side face sheet, the cold side face sheet including a plurality of noise attenuation openings.
A cowling for an engine comprising:
- an SPF/DB sandwich structure that forms an inner wall and used exclusively to form the cowling, the inner wall including a hot side face sheet, a cold side face sheet spaced radially exterior to the hot side face sheet and a sandwich core disposed there between, the hot side face sheet being directly adjacent to and positioned against an engine core of the engine and the cold side face sheet including a plurality of noise attenuation openings.
A monolithic SPF/DB sandwich structure used to form a cowling for an engine core of a turbine jet engine, the monolithic SPF/DB sandwich structure comprising:
- a core sandwiched between first and second face sheets, the core including a plurality of cells, the first face sheet being a cold side face sheet having a plurality of openings for allowing noise and air to enter into the cells and the second face sheet being a hot side face sheet, wherein the cowling is formed exclusively from the monolithic SPF/DB sandwich structure and the hot side face sheet is positioned directly adjacent to and against the engine core.
Dependencies are inferred from the claim text.