ENGINE ASSEMBLY WITH COMBINED ENGINE AND COOLING EXHAUST

摘要

An engine assembly for an aircraft, including an internal combustion engine having a liquid coolant system in fluid communication with a heat exchanger, an exhaust duct in fluid communication with air passages of the heat exchanger, a fan in fluid communication with the exhaust duct for driving a cooling air flow through the air passages of the heat exchanger and into the exhaust duct, and an intermediate duct in fluid communication with an exhaust of the engine and having an outlet positioned within the exhaust duct downstream of the fan and upstream of the outlet of the exhaust duct The outlet of the intermediate duct is spaced inwardly from a peripheral wall of the exhaust duct The engine assembly may be configured as an auxiliary power unit A method of discharging air and exhaust gases in an auxiliary power unit having an internal combustion engine is also discussed