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Acoustic Liners with Enhanced Acoustic Absorption and Reduced Drag Characteristics

机译:具有增强的声吸收和减小的阻力特性的声线

摘要

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.
机译:声学衬里可包括具有谐振腔阵列的声芯,以及横跨谐振腔阵列设置的声屏。谐振单元包括多个单元壁和由多个单元壁限定的谐振空间。声芯可以包括折叠的声芯。附加地或替代地,至少一些谐振单元可以包括倾斜的多面体蜂窝结构和/或多个消声突起。声屏可以包括网状膜和支撑格。

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