Panel for the acoustic treatment comprising hot air ducts and at least one stabilization chamber

摘要

An aircraft nacelle comprising a lip extended by an inner conduit forming an air intake, a front frame delimiting with said lip an annular channel within which hot air flows and a panel for acoustic treatment having, from outside inwardly, an acoustic resistive layer, at least one honeycomb structure and a reflective layer as well as ducts for channeling hot air, each including one inlet communicating with the annular channel and one outlet communicating with the inner conduit, wherein the panel for acoustic treatment comprises at least a stabilization chamber in the form of an annular channel with a cross-section larger than that of the ducts which extends over at least a portion of the nacelle circumference and which communicates with a plurality of ducts, the inlets and outlets not being aligned in the longitudinal direction.

主权项

1. An aircraft nacelle comprising:
a lip extended by an inner conduit forming an air intake; a front frame defining with the lip a first annular channel within which hot air flows; and a panel for acoustic treatment, the panel comprising, from outside inwardly:
an acoustic resistive layer,at least one honeycomb structure,a reflective layer,ducts for channeling the hot air, wherein each of the ducts comprise an inlet communicating with the first annular channel and an outlet communicating with the inner conduit, and at least one stabilization chamber in the form of a second annular channel with a cross-section in a longitudinal plane greater than that of the ducts, the second annular channel extending over at least a portion of a circumference of the aircraft nacelle, wherein the at least one stabilization chamber comprises a plurality of inlets in communication with the second annular channel, a plurality of outlets each communicating with one of the ducts, and a wedge for tilting flow of exhaust air in the inner conduit that is disposed inside the at least one stabilization chamber and pressed against the acoustic resistive layer in which output ports are located, and wherein the plurality of inlets and the plurality of outlets are not aligned in a longitudinal direction.