[특허]Heat exchange arrangement in a gas turbine engine fan duct for cooling hot bleed air

Heat exchange arrangement in a gas turbine engine fan duct for cooling hot bleed air 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02C-006/18
출원번호	US-0865731 (1992-04-09)
발명자 / 주소	Parsons Franklin D. (Cincinnati OH)
출원인 / 주소	General Electric Company (Cincinnati OH 02)
인용정보	피인용 횟수 : 36 인용 특허 : 0

초록 ▼

A heat exchange arrangement in an annular fan duct of a gas turbine engine includes a conduit routing hot bleed air flow, a heat exchanger disposed within the fan duct and connected with the conduit such that hot air is passed through the interior of the heat exchanger, and at least one and preferably a pair of partition members disposed within the fan duct for temporarily diverting a small portion of the main air flow from the fan duct and over the exterior of the heat exchanger in heat transfer relationship with the hot air passing through the interior of the heat exchanger. The small air flow portion rejoins the main air flow through the fan duct and is used to generate engine thrust after cooling the hot bleed air flow carried by the conduit. The partition members disposed adjacent to opposite sides of the heat exchanger and a support member define therewith an air diffusion passage through which the small fan duct air flow portion is diverted temporarily from the main fan duct air flow. The passage has an inlet and an outlet communicating with the main air flow and is larger in cross-sectional size at the location of the heat exchanger than at the inlet and outlet.

대표청구항 ▼

In an annular fan duct of a gas turbine engine defined by an annular nacelle and a casing and at least one support member extending radially between and interconnecting said nacelle and casing, said fan duct providing a main air flow for producing thrust, a heat exchange arrangement comprising: (a) a conduit connected in flow communication with a bleed flow at a temperature higher than that of the fan duct air flow, said conduit having a section extending to and from said fan duct; (b) a heat exchanger disposed within said fan duct and extending between said nacelle and casing, said heat exchanger being interposed in said conduit section such that said conduit passes the bleed air flow to the interior of said heat exchanger; and (c) means disposed within said fan duct for separating said heat exchanger from the main air flow through said fan duct and for temporarily diverting a small fractional portion of the fan duct main air flow from said main air flow to pass said fractional air flow portion over the exterior of said heat exchanger in heat transfer relationship with the bleed air flow passing through the interior of said heat exchanger and thereafter to return said fractional air flow portion to the main air flow through said fan duct where it is used to produce engine thrust after cooling the bleed air flow carried by said conduit; (d) said separating and diverting means including at least one partition member extending radially between said nacelle and casing, said partition member being oriented transversely to said heat exchanger and disposed adjacent to said heat exchanger and said support member so as to define therewith a radially and axially extending air diffusion passage through which said fractional air flow portion is diverted to pass over the exterior of said heat exchanger, said diffusion passage having an inlet and an outlet communicating with said main air flow, said inlet being spaced from one side of said heat exchanger and said outlet being spaced from an opposite side thereof, said diffusion passage being larger in cross-sectional size at the location of said heat exchanger than at said inlet and outlet of said passage and being provided with reversely tapering longitudinal configurations at said inlet and outlet of said passage such that said fractional air flow portion decreases in velocity after entering said passage through said inlet and before reaching said heat exchanger and then increases in velocity after leaving said heat exchanger and approaching said outlet.

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Heat exchange arrangement in a gas turbine engine fan duct for cooling hot bleed air 원문보기

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연합인증

Heat exchange arrangement in a gas turbine engine fan duct for cooling hot bleed air 원문보기

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