TY - JOUR
T1 - Prediction of installed jet noise from wave-packet models tuned with freejet data
AU - Antonialli, Luigi A.
AU - Cavalieri, André V.G.
AU - Nogueira, Petrônio A.S.
AU - Sirotto, José R.L.N.
AU - Cordioli, Júlio A.
N1 - Funding Information:
This work was funded by Conselho Nacional de Desenvolvimento Científico (grant number 313225/2020-6).
Publisher Copyright:
© 2023 by the American Institute of Aeronautics and Astronautics, Inc..
PY - 2023/4
Y1 - 2023/4
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85154046812&partnerID=8YFLogxK
U2 - 10.2514/1.J062247
DO - 10.2514/1.J062247
M3 - Article
AN - SCOPUS:85154046812
SN - 0001-1452
VL - 61
SP - 1749
EP - 1758
JO - AIAA Journal
JF - AIAA Journal
IS - 4
ER -