Prediction of Installed Jet Noise from Wave-Packet Models Tuned with Freejet Data
| Autor: | Luigi A. Antonialli, André V. G. Cavalieri, Petrônio A. S. Nogueira, José R. L. N. Sirotto, Júlio A. Cordioli |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | AIAA Journal. 61:1749-1758 |
| ISSN: | 1533-385X 0001-1452 |
| DOI: | 10.2514/1.j062247 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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