Processed acoustic–hydrodynamic dataset for slot and porous-media ventilation of an axisymmetric underwater body (water-tunnel experiments)

This record provides processed datasets supporting a water-tunnel study of gas ventilation on an axisymmetric underwater body, comparing slot ventilation (SV) and porous-media (microbubble) ventilation (PMV) over a controlled operating grid of Froude number (Fr) and volumetric gas flow rate (Q). The dataset includes: (i) overall sound pressure level (OASPL) tables with raw block-level values and processed statistics (mean and confidence bounds); (ii) power spectral density (PSD) curves for all operating points across all tested combinations of ventilation strategy, geometry, and porous pore size (MATLAB .fig); (iii) one-third-octave-band results for selected conditions used for repeatability verification; (iv) drag force/drag coefficient and drag-reduction metrics for reproducing drag curves and noise–drag trade-off plots; and (v) selected flow-visualization images/videos illustrating representative two-phase morphologies. The raw multi-channel time-series signals are not included; additional test details are available from the corresponding author upon reasonable request.