Prediction of installed jet noise from wave-packet models tuned with freejet data

Luigi A. Antonialli, André V.G. Cavalieri, Petrônio A.S. Nogueira, José R.L.N. Sirotto, Júlio A. Cordioli

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1 Citation (Scopus)

Abstract

In this work, a kinematic wave-packet model is used to predict installed-jet noise. Large-eddy simulation results of freejets, for Mach numbers 0.4 and 0.9, are used to obtain parameters of wave packets representing large-scale turbulent structures, which were used to provide a model source for the Lighthill analogy used to predict far-field noise spectra. The source amplitude in the model is calibrated using noise measurements for a freejet, and such a wave-packet source is used to predict noise of the same jet in an installed configuration using a tailored Green’s function. Results from the prediction model are compared to installed-jet experimental data for four different observer positions and a large range of frequencies. Overall, the model predicts both directivities and amplitudes similar to the experimental data, with a hump in the generated noise for lower Strouhal numbers and a clear peak near a Strouhal number of 0.2. This low-order model is fast and flexible, and it is expected to be helpful in preliminary aircraft design.

Original languageEnglish
Pages (from-to)1749-1758
Number of pages10
JournalAIAA Journal
Volume61
Issue number4
DOIs
Publication statusPublished - Apr 2023

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