Acoustic panel liner for an engine nacelle

US9334059B1 · kind B1 · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• Michael G. Jones · Newport News, US
• Douglas M. Nark · Norfolk, US
• Earl Ayle · Chandler, US
• Fumitaka Ichihashi · Unionville, US

Key dates

• Filing date: Jun 5, 2014
• Grant date: May 10, 2016
• Expiry date: Jun 5, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64D2033/0206
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

An acoustic panel liner includes a face sheet, back plate, and liner core positioned therebetween, which may be used in an engine nacelle. Elongated chambers contain variable amounts of septa at a calibrated depth or depths. The septa may have varying DC flow resistance. The chambers may have a hexagonal or other polygonal cross sections. The septa, such as mesh caps, may be bonded to an inner wall of a corresponding chamber. The insertion depths may be the same or different. If different, the pattern of distribution of the depths may be randomized.