B - Operations – Transporting – 64 – D
Patent
B - Operations, Transporting
64
D
B64D 33/08 (2006.01) B64D 33/10 (2006.01) B64D 41/00 (2006.01)
Patent
CA 2703108
A passive cooling system for an auxiliary power unit (APU) housed within a nacelle of an aircraft includes a compressor portion of a gas turbine engine and an oil cooler contained separately within the nacelle. An engine exhaust opening defined in the aft portion of the nacelle communicates with the gas turbine engine, and at least a first air inlet duct communicates with a second opening defined in the nacelle and with the compressor portion. The oil cooler is located within a second duct communicating with an opening other than the engine exhaust opening of the nacelle and with said engine exhaust opening. Exterior cooling air and engine exhaust ejected through the engine exhaust opening entrain cooling air through the second duct to the oil cooler, thereby providing engine oil cooling.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Pratt & Whitney Canada Corp.
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