A large dataset is used to evaluate the efficacy of multiple impedance prediction models for perforate-over-honeycomb liners. Two-factorial analysis is used to explore the relative importance of the key parameters used in these models. Tests are conducted in the NASALangley Normal Incidence Tube and Grazing Flow Impedance Tube with over eighty perforate facesheets at multiple source sound pressure levels, Mach numbers and frequencies. Each prediction model is then compared with this dataset to determine how well each method predicts the measured data. Finally, an optimizer is used to further improve the ability of one of these models to reproduce the measured results.
Comparisons of Impedance Prediction Models for Perforate-over-Honeycomb Liners
2023 AIAA Aviation and Aeronautics Forum and Exposition (AIAA AVIATION Forum) ; 2023 ; San Diego, CA, US
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English