[특허]Nacelle compartment plenum for bleed air flow delivery system

United Technologies Corporation

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특허 상세정보

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Nacelle compartment plenum for bleed air flow delivery system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F03B-015/06 F02C-009/18
미국특허분류(USC)	415/145; 415/220; 415/914
출원번호	US-0754455 (2007-05-29)
등록번호	US-8657567 (2014-02-25)
발명자 / 주소	Cloft, Thomas G. Jain, Ashok K.
출원인 / 주소	United Technologies Corporation
대리인 / 주소	Carlson, Gaskey & Olds, PC
인용정보	피인용 횟수 : 2 인용 특허 : 20

초록

A gas turbine engine is provided with a nacelle having a hollow inner space. The inner space is utilized as a plenum for directing air from an inlet to an outlet at the upstream end of the nacelle to allow control of an effective lip width of the nacelle under certain flight conditions.

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1. A gas turbine engine comprising: a nacelle defining an interior space;a fan section, a compressor section and a turbine section positioned within said nacelle, an inner cowl surrounding said compressor section and said turbine section, and said fan section delivering air to said compressor section, and bypass air between said cowl and an interior surface of said nacelle;an air inlet for capturing air and communicating the air into the interior space of said nacelle, said interior space defining a plenum, the air leaving said air inlet, flowing through the interior space of said nacelle, and into a passage, said passage communicating the air to a location adjacent an upstream end of said nacelle;a flow control for selectively blocking or allowing the flow of air through said passage to the location adjacent to the upstream end of said nacelle, and said flow control allowing the flow when it is desirable to create a thicker boundary layer at the upstream end of the nacelle;the air inlet is a pipe extending from an intake end in a bypass air passage defined between an outer periphery of said inner cowl, and radially inward of said nacelle, and having an outlet within the interior space; andthe air inlet pipe extends through a wall in the nacelle, and the outlet of the air inlet pipe then opens into communication with the interior space. 2. The gas turbine engine as set forth in claim 1, wherein the passage is a pipe having an intake within the interior space. 3. The gas turbine engine as set forth in claim 1, wherein an outlet of the passage directs the air into an interior surface of the nacelle. 4. The gas turbine engine as set forth in claim 1, wherein an outlet of the air inlet has a diffuser such that the air expands as it leaves the air inlet and enters the interior space. 5. A nacelle for a gas turbine engine comprising: a nacelle body defining an interior space, and a central bore for creating a bypass air passage, an air inlet for capturing air and communicating the air into the interior space, said interior space defining a plenum, the air leaving said air inlet, flowing through the interior space, and into a passage, said passage communicating the air to a location adjacent an upstream end of said nacelle body;a flow control for selectively blocking or allowing the flow of air through said passage to the location adjacent to the upstream end of said nacelle, and said flow control allowing the flow when it is desirable to create a thicker boundary layer at the upstream end of the nacelle;the air inlet is a pipe extending from an intake end in a bypass air passage, and having an outlet within the interior space; andthe air inlet pipe extends through a wall in the nacelle body, and the outlet of the air inlet pipe then opens into communication with the interior space. 6. The nacelle turbine engine as set forth in claim 5, wherein the passage is a pipe having an intake within the interior space. 7. The nacelle as set forth in claim 5, wherein an outlet of the passage directs the air into an interior surface. 8. The nacelle as set forth in claim 5, wherein an outlet of the air inlet has a diffuser such that the air expands as it leaves the air inlet and enters the interior space. 9. The gas turbine engine as set forth in claim 1, wherein said plenum provides a larger cross-sectional area for flow of the air than a downstream end of said air inlet opening into said plenum, and said passage having an upstream end with a flow cross-sectional area which is smaller than the cross-sectional area of said plenum. 10. A gas turbine engine comprising: a nacelle defining an interior space,a fan section, a compressor section and a turbine section positioned within said nacelle, an inner cowl surrounding said compressor section and said turbine section, and said fan section delivering air to said compressor section, and bypass air between said cowl and an interior surface of said nacelle;an air inlet for capturing air and communicating the air into the interior space of said nacelle, said interior space defining a plenum, the air leaving said air inlet, flowing through the interior space of said nacelle, and into a passage, said passage communicating the air to a location adjacent an upstream end of said nacelle;a flow control for selectively blocking or allowing the flow of air through said passage to the location adjacent to the upstream end of said nacelle, and said flow control allowing the flow when it is desirable to create a thicker boundary layer at the upstream end of the nacelle; andsaid plenum provides a larger cross-sectional area for flow of the air than a downstream end of said air inlet opening into said plenum, and said passage having an upstream end with a flow cross-sectional area which is smaller than the cross-sectional area of said plenum; andfan cowl doors are provided on an outer surface of said nacelle along a portion of said nacelle associated with said enlarged plenum, and intermediate the downstream end of said air inlet, and the upstream end of said passage. 11. The gas turbine engine as set forth in claim 10, wherein a fan control belt is mounted within said plenum. 12. The gas turbine engine as set forth in claim 1, wherein there area plurality of passages receiving air from a common plenum and a plurality of air inlets delivering air into a common plenum. 13. The nacelle as set forth in claim 5, wherein said plenum provides a larger cross-sectional area for flow of the air than a downstream end of said air inlet opening into said plenum, and said passage having an upstream end with a flow cross-sectional area which is smaller than the cross-sectional area of said plenum. 14. A nacelle for a gas turbine engine comprising: a nacelle body defining an interior space, and a central bore for creating a bypass air passage, an air inlet for capturing air and communicating the air into the interior space, said interior space defining a plenum, the air leaving said air inlet, flowing through the interior space, and into a passage, said passage communicating the air to a location adjacent an upstream end of said nacelle body; a flow control for selectively blocking or allowing the flow of air through said passage to the location adjacent to the upstream end of said nacelle, and said flow control allowing the flow when it is desirable to create a thicker boundary layer at the upstream end of the nacelle; and fan cowl doors are provided on an outer surface of said nacelle along a portion of said nacelle associated with said enlarged plenum, and intermediate the downstream end of said air inlet, and the upstream end of said passage. 15. The nacelle as set forth in claim 5, wherein a fan control belt is mounted within said plenum. 16. The nacelle as set forth in claim 5, wherein there are a plurality of passages receiving air from a common plenum and a plurality of air inlets delivering air into a common plenum.

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Nacelle compartment plenum for bleed air flow delivery system

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Nacelle compartment plenum for bleed air flow delivery system

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