Acoustic structure for a gas turbine engine

摘要

An acoustic structure (20) for a gas turbine engine comprises a noise reduction layer (20a) and a fire protector layer (20b) connected to the noise reduction layer (28). The noise reduction (24) includes a perforated inner wall (22) adapted to be in contact with a first fluidic environment (E1), and a noise reduction (24) adjacent to the inner wall (22). The fire protector layer (20b) includes a non-perforated outer wall (26) adapted to be in contact with a second fluidic environment (E1) having potentially a fire, a fire protector (28) adjacent to the outer wall (26), and a pressure resisting wall (30) disposed between the fire protector (28) and the noise reduction (24). The second fluidic environment (E2) is under a pressure lower than a pressure of the first fluidic environment (E1). The inner and outer walls (22, 26) are load-bearing walls of the acoustic structure (20).