Sanjose, Marlene et Shanthalingam, Baahirham. 2023. « Interaction noise for a rotor-stator assembly in a short duct ». Communication lors de la conférence : Acoustics Week in Canada (Montreal, QC, Canada, Oct. 03-06, 2023).
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Résumé
Aeroacoustic noise emission is an area of extensive research in turbomachinery, helicopters, and airplanes. The helicopter tail rotor can be a significant source of noise during takeoff, landing, and flight maneuvers. In the present work, the aeroacoustic noise sources in a high-thrust ducted fan system, typically designed for an electrically driven anti-torque system, are investigated. The rotor-stator fan system is first studied using Reynolds Averaged Navier-Stokes (RANS) simulations, and noise predictions have been computed using classical analytical approaches based on empirical and statistical modeling of the noise sources. The noise sources investigated are multiple in such a compact assembly, including both broadband and tonal noise sources at the leading and trailing edges of the rotor blades and stator vanes. These evaluations have shown limited accuracy when compared to experiments. The present work focuses on the analysis of Unsteady RANS (URANS) simulations to provide a better understanding of the rotor-stator interaction noise. In this work, the URANS simulation is performed using the ANSYS CFX software. The domain is limited to half of the machine with rotational periodicity and includes the casing and hub geometric features of the complete fan assembly in a large domain to capture the fan wake evolution in free field. Simulations were performed over 30 revolutions. Both the periodic wake and the blade tip vortex generated by the rotor are studied to better capture their interactions with the stator vanes. The analytical approaches for noise prediction are compared with the far-field noise calculated by an acoustic analogy using the pressure fluctuations recorded during the simulation. Both free field and infinite duct Green functions are considered to evaluate potential shielding effects from the casing.
| Type de document: | Communication (Communication) |
|---|---|
| Informations complémentaires: | Résumé disponible : https://awc.caa-aca.ca/index.php/AWC/AWC23/paper/view/1142 |
| Chercheur(-euse): | Chercheur(-euse) Sanjosé, Marlène |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 20 août 2024 19:55 |
| Dernière modification: | 03 sept. 2026 16:21 |
| URI: | https://espace2.etsmtl.ca/id/eprint/29328 |
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