Local Noise Dissipation Mechanism and Flow Impedance in Acoustic Liner Grazed by Turbulent Flow and Acoustic Wave
Francesco AVALLONE, Angelo PADUANO, Francesco SCARANO
Abstract. The acoustic energy dissipation mechanisms of a single-degree-of-freedom liner under grazing turbulent flow are investigated using high-fidelity lattice-Boltzmann very-large-eddy simulations. Viscous and vortex-shedding contributions are quantified through stress-based integration and Howe’s energy corollary. Results confirm that grazing flow modifies local shear structures and enhances dissipation at more downstream locations. The evolving flow field alters liner impedance and shifts the balance between viscous and vortical losses, emphasizing the importance of flow development in liner characterization.
Keywords
Aeroacoustics, Acoustic Liner, Turbulent Flows
Published online 7/20/2026, 6 pages
Copyright © 2026 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Francesco AVALLONE, Angelo PADUANO, Francesco SCARANO, Local Noise Dissipation Mechanism and Flow Impedance in Acoustic Liner Grazed by Turbulent Flow and Acoustic Wave, Materials Research Proceedings, Vol. 69, pp 281-286, 2026
DOI: https://doi.org/10.21741/9781644904251-50
The article was published as article 50 of the book CEAS – AIDAA Conference 2025
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] Christopher K. W. Tam and Konstantin A. Kurbatskii. Microfluid Dynamics and Acoustics of Resonant Liners. AIAA Journal, 38(8):1331-1339, August 2000. https://doi.org/10.2514/2.1132
[2] M. S. Howe. Contributions to the theory of aerodynamic sound, with application to excess jet noise and the theory of the flute. Journal of Fluid Mechanics, 71(4):625-673, October 1975. https://doi.org/10.1017/S0022112075002777
[3] M.S. Howe. The dissipation of sound at an edge. Journal of Sound and Vibration, 70(3):407-411, June 1980. https://doi.org/10.1016/0022-460X(80)90308-9
[4] N.T. Quintino, L.A. Bonomo, J.A. Cordioli, M.G. Jones, B.M. Howerton, D.M Nark, and F. Avallone. Comparison of Impedance Eduction Test Rigs with Different Boundary-Layer Profiles. AIAA Journal, 2025. https://doi.org/10.2514/1.J065173
[5] Oliver T. Schmidt and Tim Colonius. Guide to Spectral Proper Orthogonal Decomposition. AIAA Journal, 58(3):1023-1033, March 2020. https://doi.org/10.2514/1.J058809
[6] Aaron Towne, Oliver T. Schmidt, and Tim Colonius. Spectral proper orthogonal de-composition and its relationship to dynamic mode decomposition and resolvent analysis. Journal of Fluid Mechanics, 847:821-867, July 2018. https://doi.org/10.1017/jfm.2018.283
[7] Angelo Paduano, Francesco Scarano, Julio Cordioli, Damiano Casalino, and Francesco Avallone. On the impact of the turbulent grazing flow development on the acoustic response of an acoustic liner. arXiv preprint arXiv:2507.22714, 2025. https://doi.org/10.1017/jfm.2026.11544
