Gas turbine outer case active ambient cooling including air exhaust into sub-ambient cavity
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United States of America Patent
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Oct 9, 2018
Grant Date -
Sep 25, 2014
app pub date -
Jan 22, 2013
filing date -
Dec 8, 2011
priority date (Note) -
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Abstract
A gas turbine engine including an outer case and an exhaust gas passage defined within the outer case for conducting an exhaust gas flow from a turbine section of the gas turbine engine. A cooling channel is associated with an outer surface of the outer case, the cooling channel having a channel inlet and a channel outlet. An air duct structure is provided and includes an inlet end in fluid communication with the channel outlet and includes an outlet end in fluid communication with an area of reduced pressure relative to the air duct structure inlet end. An exit cavity is located at the air duct structure outlet end, wherein the exit cavity effects a reduced pressure at the outlet end to draw air from the cooling channel into the air duct.
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