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- W1971041311 abstract "New calculations show that segmenting is most efficient at high frequencies with relatively long duct lengths where the attenuation is low for both uniform and segmented liners. Statistical considerations indicate little advantage in using optimized liners with more than two segments while the bandwidth of an optimized two-segment liner is shown to be nearly equal to that of a uniform liner. Multielement liner calculations show a large degradation in performance due to changes in assumed input modal structure. Computer programs are used to generate theoretical attenuations for a number of liner configurations for liners in a rectangular duct with no mean flow. Overall, the use of optimized multisectioned liners fails to offer sufficient advantage over a uniform liner to warrant their use except in low frequency single mode application." @default.
- W1971041311 created "2016-06-24" @default.
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- W1971041311 date "1979-01-15" @default.
- W1971041311 modified "2023-09-24" @default.
- W1971041311 title "Optimized multisectioned acoustic liners" @default.
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- W1971041311 doi "https://doi.org/10.2514/6.1979-182" @default.
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