TURBOSHAFT ENGINE SUPPORTING PYLON COVERED WITH A POROUS MATERIAL AND TURBOSHAFT ENGINE/PYLON ASSEMBLY

摘要

The invention relates to a turboshaft engine supporting pylon covered with a porous material and to a turboshaft engine/pylon assembly. More specifically, the invention relates to a pylon (2) supporting a turboshaft engine (1) on an aircraft, the outer surface of which is covered at least partially with a porous material in order to reduce the amplitude of the acoustic waves leaving the turboshaft engine (1). The invention also relates to an assembly comprising a turboshaft engine (1) and a pylon (2), in which the pylon (2) extends longitudinally from upstream to downstream and comprises an upper part (21) for securing to the aircraft, a lower part (22) for securing to the turboshaft engine (1) and an absorption part (23) extending in the exhaust stream from the turboshaft engine (1) and comprising an internal absorption part (26) extending inside the turboshaft engine (1) and an external absorption part (24) extending downstream of the turboshaft engine (1). According to the invention, the outer surface of the upstream end (25) of the external absorption part (24) of the pylon is covered with a porous material such as to limit noise formation downstream of the engine.