| 主权项 |
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. |
