Lattice-Boltzmann acoustic liner impedance dataset, single-tone excitation, ChamferDouble orifice geometry, 145 dB peak SPL cases (part of an 8-part collection) — supporting data for npj Acoustics 2, 6 (2026)

Part of an 8-part Zenodo collection, split by facesheet orifice geometry and peak SPL (see related identifiers below for the umbrella record and sibling parts). This part contains the 4 'SingleT' (single-tone excitation) cases using the ChamferDouble (double-chamfered orifice edges) facesheet orifice geometry at 145 dB peak SPL, across 800-2000 Hz excitation. Each case folder contains an h5_export/ subfolder with the simulation results in plain, open-format HDF5 (readable with h5py, MATLAB, Julia, R, or any HDF5-aware tool): three monitoring-plane surface fields (plane_duct_hr.h5, plane_backplate.h5, plane_facesheet.h5) with density, x/y/z velocity and static pressure in physical (SI) units, plus the underlying unstructured surfel mesh; and eleven single-point probe time series (probe_1.h5 … probe_11.h5) along the tube axis. See metadata.md for the case table and file/variable reference. This dataset supports the findings reported in: Avallone, F., Khedr, A., Paduano, A., Scarano, F., Meirelles, L. & Cordioli, J. "On the relevance of facesheet orifice geometry to acoustic liner impedance", npj Acoustics 2, 6 (2026). https://doi.org/10.1038/s44384-026-00044-xAcknowledgementsThe work of F. Avallone, A. Paduano and F. Scarano is co-funded by the European Union (ERC, LINING, 101075903). Views and opinions expressed are, however, those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council. Neither the European Union nor the granting authority can be held responsiblefor them. The work is partially supported by the AeroAcoustics Research Consortium (AARC), a government-industry partnership supporting pre-competitive research for aircraft noise reduction. L. Meirelles acknowledges scholarship funding from CNPq (168115/2023-9). The authors acknowledge Fundaҫão CERTI (Brazil) for their contributions to the metrological aspects of this research. The authors thankD. Casalino for the discussions and suggestions about the numerical setup