Proposed Changes

Adds a command-line aeroacoustic post-processing tool for unsteady pressure histories generated by SU2. The tool reads standard history.csv output and computes pressure power spectral density using Welch's method, narrowband SPL, OASPL, and dominant frequency.

Multiple pressure probes, transient sample removal, nondimensional pressure scaling, configurable windows, overlap, and detrending are supported. Results are written to CSV with an optional JSON summary.

This contribution only adds post-processing functionality and does not modify the flow solver or existing LES numerics.

Related Work

This is not associated with an existing issue or pull request. It complements the existing LES and hybrid RANS–LES capabilities by providing a workflow for analyzing unsteady pressure-probe output.

PR Checklist

• I am submitting my contribution to the develop branch.
• My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
• My contribution is commented and consistent with SU2 style (https://su2code.github.io/docs_v7/Style-Guide/).
• I used the pre-commit hook to prevent dirty commits and used pre-commit run --all to format old commits.
• I have added a test case that demonstrates my contribution, if necessary.
• I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.