Air cooled air cooler for gas turbine engine air system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-007/14
F02C-007/18
B21D-053/02
F02C-003/32
출원번호
US-0684863
(2012-11-26)
등록번호
US-9458764
(2016-10-04)
발명자
/ 주소
Alecu, Daniel
Kostka, Richard
출원인 / 주소
PRATT & WHITNEY CANADA CORP.
대리인 / 주소
Norton Rose Fulbright Canada LLP
인용정보
피인용 횟수 :
1인용 특허 :
18
초록▼
An air-to-air cooler has a heat exchanger integrated to a housing. A first passage extends through the housing for directing a flow of cooling air through the heat exchanger. A second passage extends through the housing for directing a flow of hot air to be cooled through the heat exchanger. The fir
An air-to-air cooler has a heat exchanger integrated to a housing. A first passage extends through the housing for directing a flow of cooling air through the heat exchanger. A second passage extends through the housing for directing a flow of hot air to be cooled through the heat exchanger. The first passage has a cooling air outlet tube disposed downstream of the heat exchanger. The cooling air outlet tube extends across the second passage between the heat exchanger and a hot air inlet of the second passage. The hot air inlet is disposed to cause incoming hot air to flow over the cooling air outlet tube upstream of the heat exchanger. An ejector drives the flow of cooling air through the first passage of the air-to-air cooler. A portion of the hot air flow may be used to drive the ejector.
대표청구항▼
1. An air-to-air cooler for a gas turbine engine, comprising a housing, a heat exchanger matrix integrated to said housing, a first passage extending through said housing for directing a flow of cooling air through said heat exchanger matrix, a second passage extending through said housing for direc
1. An air-to-air cooler for a gas turbine engine, comprising a housing, a heat exchanger matrix integrated to said housing, a first passage extending through said housing for directing a flow of cooling air through said heat exchanger matrix, a second passage extending through said housing for directing a flow of hot air to be cooled through the heat exchanger matrix, the heat exchanger matrix promoting heat transfer from the flow of hot air to the flow of cooling air, the first passage including a single cooling air outlet tube disposed downstream of the heat exchanger matrix relative to the flow of cooling air, the single cooling air outlet tube extending across said second passage between the heat exchanger matrix and a hot air inlet of said second passage, the hot air inlet being disposed to cause incoming hot air to flow over the single cooling air outlet tube upstream of the heat exchanger matrix, and an ejector mounted inside the single cooling air outlet tube for driving the flow of cooling air through the first passage of the air-to-air cooler, wherein the single cooling air outlet tube extends through the housing perpendicularly to the flow of hot air leaving said hot air inlet, the single cooling air outlet tube having an outer surface offering a flow distribution surface for the hot air to be cooled prior to its entry into the heat exchanger matrix, wherein the cooling air exiting the heat exchanger matrix is collected into a single elbow tube connected to the single cooling air outlet tube, said outer surface of the single cooling air outlet tube being internal to and coaxial with a hollow portion of the housing, wherein an annular gap (h) is formed between the single cooling air outlet tube and the hollow portion of the housing on the hot air inlet side of the housing, wherein the annular gap (h) opens into said heat exchanger matrix portion of the housing on the side opposite from the hot air inlet. 2. The air-to-air cooler defined in claim 1, wherein said hot air inlet and said single cooling air outlet tube generally extend in a same plane, and wherein said hot air inlet is oriented transversally to said single cooling air outlet tube, thereby causing the hot air entering said housing to impinge upon the single cooling air outlet tube. 3. The air-to-air cooler defined in claim 1, wherein the second air passage has an upstream section which extends between the hot air inlet and the heat exchanger matrix, said upstream section including the annular gap (h) defined between the housing and the single cooling air outlet tube. 4. The air-to-air cooler defined in claim 1, wherein the single elbow tube defines a 180 degree bend between the heat exchanger matrix and the single cooling air outlet tube. 5. The air-to-air cooler defined in claim 1, wherein the ejector has a motive flow inlet communicating with said second air passage, thereby allowing a portion of the hot air flowing through the second passage to be used to drive the ejector. 6. The air-to-air cooler defined in claim 5, wherein the hot air inlet leads to a hot air inlet plenum inside the housing, wherein said single cooling air outlet tube extends through said inlet plenum, and wherein air holes are defined in said single cooling air outlet tube for routing a portion of the hot air flowing over the single cooling air outlet tube to the motive flow inlet of the ejector. 7. The air-to-air cooler defined in claim 6, wherein the ejector is mounted inside an outlet end of the single cooling air outlet tube, the ejector having an axially projecting annular front lip, the single cooling air outlet tube having an annular inner shoulder projecting inwardly from an inner surface of the single cooling air outlet tube, the inner shoulder and the front lip defining an axial gap therebetween to form part of the motive flow inlet of the ejector, the air holes being in fluid flow communication with the axial gap. 8. The air-to-air cooler defined in claim 7, wherein the ejector has a mounting flange extending radially outwardly relative to the front lip, wherein the ejector motive flow inlet comprises a motive flow manifold, said motive flow manifold being bounded axially by the inner shoulder of the single cooling air outlet pipe and the mounting flange of the ejector, and radially by the inner surface of the single cooling air outlet tube and the front lip of the ejector, the air holes in the single cooling air outlet tube communicating with the motive flow manifold, which in turn, communicates with the axial gap. 9. An air-to-air cooler for a gas turbine engine, comprising a housing, a heat exchanger matrix provided in said housing, a first passage extending through said housing and directing a flow of cooling air through said heat exchanger matrix, a second passage extending through said housing and directing a flow of hot air to be cooled through the heat exchanger matrix, the heat exchanger matrix promoting heat transfer from the flow of hot air to the flow of cooling air, and an ejector tapping into the second passage and using a portion of the incoming flow of hot air as a source of motive fluid for driving the flow of cooling air through the first passage, the ejector being mounted inside an end portion of the cooling air outlet tube of the first passage downstream of the heat exchanger matrix relative to the flow of cooling air, the end portion of the cooling air outlet tube being internal to a hot air inlet manifold inside the housing, air holes being defined in said cooling air outlet tube, said air holes linking said hot air inlet manifold in fluid flow communication with a motive flow inlet of the ejector, the hot air inlet manifold being in fluid flow communication with a heat exchanger matrix portion of the housing on a side opposite to a hot air inlet side thereof, wherein the cooling air exiting the heat exchanger matrix is collected into a single elbow tube connected to the cooling air outlet tube, the cooling air outlet tube having an outer surface, said outer surface being internal to and coaxial with a hollow portion of the housing, wherein an annular gap (h) is formed between the cooling air outlet tube outer surface and the hollow portion of the housing on the hot air inlet side of the housing, and wherein the annular gap (h) opens into the heat exchanger matrix portion of the housing on the side opposite from the hot air inlet. 10. The air-to-air cooler defined in claim 9, wherein the motive flow inlet is supplied with hot air from the second passage upstream of the heat exchanger matrix. 11. The air-to-air cooler defined in claim 10, wherein the ejector is installed in the first passage at a location downstream from the heat exchanger matrix relative to the flow of cooling air through the first passage. 12. The air-to-air cooler defined in claim 9, wherein the second passage includes a hot air inlet communicating with the hot air inlet manifold inside said housing, the cooling air outlet tube being mounted inside said housing and extending through said hot air inlet manifold so that the hot air admitted into the hot air inlet manifold via said hot air inlet flows over the cooling air outlet tube. 13. The air-to-air cooler defined in claim 12, wherein the cooling air outlet tube has an annular inner shoulder, the ejector having an axially extending front lip, the annular inner shoulder and the axially projecting front lip defining a calibrated axial gap, the calibrated axial gap communicating with the air holes. 14. The air-to-air cooler defined in claim 13, wherein the ejector has a mounting flange extending radially outwardly relative to the axially projecting front lip, the mounting flange being secured to the surrounding wall of the cooling air outlet tube, and wherein the surrounding wall of the cooling air outlet tube, the axially projecting front lip, the inner shoulder and the mounting flange define and annular motive flow manifold disposed in flow communication between the air holes and the axial gap.
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