Analysis for sound attenuation in the acoustically lined annular flow duct separated by an elastic circumferential splitter

✍ Scribed by S.-H. Ko

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 562 KB
• Volume: 36
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1016/s0022-460x(74)80342-1

✦ Synopsis

A theoretical investigation is made of the sound attenuation in an acoustically lined annular duct, the inner and outer walls of which are separated by a concentric circumferential splitter parallel to the inviscid fluid flow. The splitter is considered as an elastic solid medium. An eigenvalue problem is formulated by establishing pertinent boundary conditions across the fluid-solid intersurfaces at the inner and outer acoustic linings and at the splitter. The theoretical prediction of the sound attenuation is based on an expression for the acoustic energy flow in the duct.