Acoustic liners with enhanced acoustic absorption and reduced drag characteristics

US11434819B2 · kind B2 · utility

Assignees

• General Electric Company · US
• MRA SYSTEMS, LLC · US

Inventors

• Shanmugam Murugappan · Mason, US
• Michael Moses Martinez · San Diego, US
• Egbert Geertsema · Cincinnati, US
• Rudramuni Kariveerappa Majjigi · Cincinnati, US
• Richard David Cedar · Montgomery, US
• Wendy Wenling Lin · Montgomery, US
• Robert William Davidoff · Greenville, US
• David Patrick Calder · Baltimore, US
• Graham Frank Howarth · Middletown, US

Key dates

• Filing date: Mar 29, 2019
• Grant date: Sep 6, 2022
• Expiry date: Nov 28, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2250/283
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An acoustic liner may include an acoustic core having an array of resonant cells, and an acoustic screen disposed across the array of resonant cells. The resonant cells include a plurality of cell walls and a resonant space defined by the plurality of cell walls. The acoustic core may include a folded acoustic core. Additionally, or in the alternative, at least some of the resonant cells may include an oblique polyhedral cellular structure and/or a multitude of sound-attenuating protuberances. The acoustic screen may include a reticulate membrane and a support lattice.