23rd AIAA/CEAS Aeroacoustics Conference 2017
DOI: 10.2514/6.2017-3023
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A Requirements-Driven Optimization Method for Acoustic Liners using Analytic Derivatives

Abstract: More than ever, there is flexibility and freedom in acoustic liner design. Subject to practical considerations, liner design variables may be manipulated to achieve a target attenuation spectrum. But characteristics of the ideal attenuation spectrum can be difficult to know. Many multidisciplinary system effects govern how engine noise sources contribute to community noise. Given a hardwall fan noise source to be suppressed, and using an analytical certification noise model to compute a community noise measure… Show more

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