An example auxiliary power unit (APU) exhaust silencer includes cooling features to protect the outer skin and other components from heat generated by gases passing through an exhaust duct. Cooling air flow through a cooling air passage in thermal contact with the exhaust silencer carries heat away from other nearby components and the aircraft skin.
1. An auxiliary power unit noise reduction system comprising: an exhaust duct;an exhaust silencer surrounding the exhaust duct, the exhaust silencer including a plurality of baffles in communication with the exhaust duct;a passage disposed around the exhaust silencer and in thermal communication with the exhaust silencer, wherein the passage includes an opening within a plane transverse to a longitudinal axis of the exhaust duct and common with a terminal end of the exhaust duct; anda source of cooling air flow that draws cooling air in through the openi...
이 특허에 인용된 특허 (13)
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