Patent ID: 8960589
Filing Date: 2015-02-24
Classification: B64D,F02C,F05D,Y02T

Abstract:
1. An acoustic treatment panel, comprising: an acoustically resistive layer that defines an outer surface of an aircraft that is in contact with an aerodynamic stream; a reflective layer; and at least one alveolar structure located between the acoustically resistive layer and the reflective layer, the at least one alveolar structure comprising a plurality of cells configured for acoustic treatment, the cells being formed of elongated strips extending parallel to one another, each of the strips being delimited by two opposite side partitions and each of the strips being spaced apart from one another to form elongated de-icing cavities extending in between adjacent strips such that, during operation, hot air circulates through the de-icing cavities in contact with said acoustically resistive layer for frost treatment, wherein a rear wall, extending from opposite facing side partitions of the adjacent strips and enclosing each of the de-icing cavities between the strips, includes holes in communication with each de-icing cavity for supplying each de-icing cavity with hot air, and wherein along an entire length of the rear wall over any one de-icing cavity, a ratio of open space formed by the holes to a closed area of the rear wall along the length varies irregularly to delimit zones having differing communication with the hot air for differing capacities for frost treatment.