Patent ID: 8235170
Filing Date: 2012-08-07
Classification: F01D,F02C,F05D,Y02T

Abstract:
1. A low-noise integrated tailcone muffler (ITM) assembly for use in an aircraft tailcone having a gas turbine engine that exhausts gasses therethrough, comprising: a tailcone defining a conical backing cavity, the conical backing cavity having a large forward end and a narrow extreme aft end; a permeable exhaust liner with a first end and a second end, the first end coupled to an oil cooler eductor discharge plenum of the gas turbine engine and a second end discharging directly to atmosphere via the narrow extreme aft end of the conical backing cavity; a bleed air discharge conduit configured to discharge pressurized bleed air from the gas turbine engine into the conical backing cavity; and a firewall bulkhead defining the large forward end of the conical backing cavity, defining a first aperture passing the porous exhaust liner and defining a second aperture passing the bleed air discharge conduit, the firewall bulkhead extending radially from both of the porous exhaust liner and the bleed air discharge conduit.