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Modes form the basic ingredients of duct acoustics. Modes in non-uniform mean flow are important for the understanding of sound propagation in aero-engines. These modes are mathematically described by the Pridmore-Brown equation.
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This page is a summary of: Numerical and Asymptotic Solutions of the Pridmore-Brown Equation, AIAA Journal, July 2020, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/1.j059140.
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