[특허]Nacelle cooling and ventilation system

Nacelle cooling and ventilation system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02C-007/06
출원번호	US-0700975 (1991-05-16)
발명자 / 주소	Laborie Daniel J. (Cincinnati OH) Marban Joseph R. (Springdale OH) Schulze Wallace M. (West Chester OH) Baumbick Robert J. (West Chester OH)
출원인 / 주소	General Electric Company (Cincinnati OH 02)
인용정보	피인용 횟수 : 55 인용 특허 : 0

초록 ▼

A nacelle cooling and ventilation system for an aircraft gas turbine engine which includes a chin scoop and duct assembly for directing air through the engine bay where it is exhausted into the engine exhaust through an exhaust shroud eductor. The nacelle is enclosed so that effectively all of the cooling air entering the bay leaves the bay through the engine exhaust and is not dumped overboard, thereby adding to the effective thrust of the engine. An engine oil and generator oil heat exchanger is positioned in the cooling air duct into the bay so that the same air which cools the bay also cools engine and generator oil. The oil heat exchanger includes directional louvers which regulate and keep to a minimum the amount of cooling air and direct cooling air forwardly in the bay so that the entire bay area is cooled, and which can be shut as a fire control measure. The nacelle includes bay vent doors which are opened in response to a high oil temperature condition or in an engine shutoff condition on ground to provide auxiliary air flow from the bay. The doors are positionable by an actuator but can be disconnected from the actuator to pivot freely in response to a sudden increase in nacelle bay pressure.

대표청구항 ▼

In a nacelle having a turbine engine in a bay thereof, an engine inlet for supplying combustion air to said engine, an exhaust shroud forming an annular passage with an exhaust conduit of said engine for evacuating air from within said engine bay, a chin scoop for receiving cooling air and an air/oil heat exchanger receiving cooling air from said chin scoop, a cooling and ventilation system comprising: duct means for discharging air from said heat exchanger into said bay wherein said discharged air cools said engine and is drawn through said annular passage into said engine exhaust, whereby thrust recovery is minimized and overboard dumping of cooling air is minimized; wherein said annular passage includes an entrance adjacent to and in direct fluid flow communication with said bay; wherein said bay is substantially enclosed by said nacelle wherein effectively all cooling air entering said bay enters from said chin scoop, wherein the cooling air provided for use in said air/oil heat exchanger and for cooling said engine is provided with minimum reductions in aerodynamic efficiency; said cooling and ventilation system further comprising means for regulating air flow from said heat exchanger through said bay such that nacelle cooling and ventilation flows are held to a minimum; wherein said regulating means includes adjustable louver means mounted on said heat exchanger and temperature sensing means for positioning said louver means to increase or decrease air flow to said nacelle whereby bay temperature of oil cooled by said heat exchanger is maintained within a predetermined range; and wherein said louver means is oriented to discharge cooling air toward a forward portion of said nacelle before the cooling air is drawn rearwardly through said annular passage.

이 특허를 인용한 특허 (55)

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Rodgers Joseph H. (Vernon CT) Kasprow Robert F. (Wethersfield CT), Method of operating a gas turbine engine powerplant for an aircraft.
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