[특허]Flow distribution system for inlet flow control

United Technologies Corporation

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Flow distribution system for inlet flow control

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64C-021/04
미국특허분류(USC)	244/207
출원번호	UP-0754561 (2007-05-29)
등록번호	US-7708230 (2010-06-03)
발명자 / 주소	Cloft, Thomas G. Wall, Sarah M.
출원인 / 주소	United Technologies Corporation
대리인 / 주소	Carlson, Gaskey & Olds
인용정보	피인용 횟수 : 3 인용 특허 : 20

초록

A nacelle structure for a gas turbine engine includes an inlet aft of an exit guide vane for supplying air flow to a forward plenum. Air is exhausted from the plenum into an air intake opening and over an inner surface of the nacelle for controlling air flow characteristics within the nacelle.

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What is claimed is: 1. An inlet flow control system for a nacelle comprising: an air intake opening; an inlet disposed in an aft portion of the nacelle for drawing in airflow; a plenum disposed adjacent said air intake opening for receiving air flow from said inlet; and an outlet disposed on an outer surface of the nacelle for communicating air flow from said plenum along the outside of the nacelle and into said air intake opening of the nacelle for tailoring airflow within said nacelle to current operating conditions. 2. The system as recited in claim 1, wherein said plenum comprises a cavity within the nacelle. 3. The system as recited in claim 1, wherein said outlet comprises a flow control device for governing air flow out onto the leading edge of the nacelle. 4. The system as recited in claim 1, including a plurality of separate inlets for drawing air into a corresponding plurality of passages, where each of the plurality of passages are in communication with said plenum. 5. The system as recited in claim 4, including a corresponding plurality of control valves for governing air flow from each of said plurality of inlets and said plenum. 6. The system as recited in claim 1, wherein said outlets are disposed about an entire circumference of the air intake opening. 7. The system as recited in claim 1, wherein said outlets are disposed about a partial portion of the air intake opening. 8. The system as recited in claim 1, wherein said outlet communicates air to an external surface of said nacelle. 9. The system as recited in claim 1, wherein said outlets communicate air to an internal surface of said nacelle. 10. A nacelle assembly for a gas turbine engine comprising: an outer surface; an inner surface defining an air flow path; an intake opening disposed along said inner surface; a plenum disposed within said nacelle assembly; an outlet disposed on the outer surface that is in communication with said plenum for directing air flow along the outer surface and into said air intake opening onto said inner surface for controlling flow properties of intake air into said nacelle; an inlet for supplying exhaust air flow to said plenum; and a control valve for controlling air flow from said inlet to said plenum. 11. The assembly as recited in claim 10, wherein said plenum comprises a cavity disposed about a circumference of said nacelle. 12. The assembly as recited in claim 10, wherein said outlet comprises a plurality of outlets in said outer surface that are disposed at least partially about a circumference of said nacelle. 13. The assembly as recited in claim 10, wherein said outlet comprises a plurality of outlets in said inner surface that are disposed at least partially about a circumference of said nacelle. 14. The assembly as recited in claim 10, including a plurality of passages between said inlet and said plenum and a corresponding plurality of control valves for controlling air flow from said plurality of inlets to said plenum. 15. A nacelle assembly for a gas turbine engine comprising: an outer surface; an inner surface defining an air flow path; an intake opening disposed along the inner surface; a plenum disposed within said nacelle assembly; an outlet in communication with said plenum for directing air flow into said air intake opening onto said inner surface for controlling flow properties of intake air into said nacelle: an inlet for supplying exhaust air flow to said plenum, wherein said inlet is disposed aft of an exhaust guide vane of the gas turbine engine; and a control valve for controlling air flow from said inlet to said plenum. 16. A method of controlling air flow through an intake of a nacelle assembly, said method comprising the steps of: drawing air from an aft portion of the nacelle assembly through a plurality of separate passages; receiving air flow from the plurality of passages into a cavity near an intake opening of the nacelle assembly; and injecting air through an opening on an outer surface of the nacelle into the intake opening of the nacelle assembly for tailoring airflow along an inner surface of the nacelle near the leading edge that flows over the leading edge and into the nacelle assembly. 17. The method as recited in claim 16 including the step of controlling the air flow through the passage with a control valve. 18. The method as recited in claim 17 including the step of selectively opening the control valve to control a pressure within the cavity.

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Flow distribution system for inlet flow control

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Flow distribution system for inlet flow control

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