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    • 174. 发明授权
    • Anechoic visco-thermal liner
    • 消声粘度热衬套
    • US07469770B2
    • 2008-12-30
    • US11477290
    • 2006-06-29
    • William P. Patrick
    • William P. Patrick
    • G10K11/16E04B1/84G10K11/04E04B1/82
    • B64D33/02B64D2033/0206
    • A liner assembly includes a plurality of aligned passages providing a large open area combined with openings much smaller than a length of the passages. The plurality of passages are disposed parallel with each other and include an opening transverse to incident sound waves. The passages are separated by walls and are blocked at an end distal from the openings. Sound waves incident on a face of the liner enter the passages and are dissipated by viscous losses. Sound energy is further dissipated as thermal energy to the walls of the passages. The long narrow passages provide the desired visco-thermal losses for sound energy in a broad frequency range.
    • 衬套组件包括多个对齐的通道,其提供与比通道的长度小得多的开口组合的大开口区域。 多个通道彼此平行设置并且包括横向于入射声波的开口。 通道被壁分隔开,并在远离开口的一端被阻塞。 入射在衬垫表面上的声波进入通道并被粘性损失消散。 声能作为热能进一步消散到通道的壁上。 长的狭窄通道为广泛的频率范围内的声能提供所需的粘热损失。