Akustische Auskleidung für einen Motor eines Senkrecht Startenden und Landenden Flugzeugs

Details

Veröffentlichungs-Nr.

EP4718441

Anmeldetag

19. Dezember 2023

Veröffentlichung

1. April 2026

Rechtsraum

EP

Abstract

The present invention relates to an acoustic liner (100) of a propulsion unit (500) of a vertical take-off and landing aircraft (600), which is operable between a hover position (HP) and a cruise position (CP). The acoustic liner (100) comprises a face-layer (110) with openings (111), a core-structure (120), which is coupled to an inner surface (113) of the face-layer (110) and comprises cells (121) with cell walls (122) surrounding cell cavities that are in fluid communication with the openings (111) to function as acoustic resonators. The acoustic liner (100) further comprises a base-layer (130) that covers the core-structure (120) on a side opposite to the face-layer (110). The core-structure (120) comprises also a plurality of drainage slots (140, 141, 142) that cut through the cell walls (122) of adjoining cells (121) for forming a network of interconnected fluid communication paths between the respectively slotted cells (121). The plurality of drainage slots (140, 141, 142) comprises a group of hover slots (141) and a group of cruise slots (142), which extend along slot directions (1410, 1420) that are different to each other. The acoustic liner (100) also comprises at least one drainage opening (131) that is in fluid communication with at least one of the slotted cells (121) for draining fluid entering the cell cavities via the openings (111) through the drainage slots (140, 141, 142). The present invention also relates to a propulsion unit (500) and an aircraft (600)

Anmelder

Firmen

Archer Aviation Inc.
Lilium GmbH

Land

🇺🇸 USA