I am in need to validate the codes for aeroacoutics computational simulation. What are the standard test cases in computational simulation of Aeroacoustics, whose experimental data will be available?
Did you have a look to the benchmark problems used for the computational aeroacoustics workshops? They are available on the NASA Technical Reports server. There are different test cases of increasing complexity. Analytical solutions are usually provided as well.
If you want to validate the computation of the acoustic field from an a priori known flow velocity field using Lighthill's analogy, an academic example is the computation of the sound generated by a corotating vortex pair. A detailed description and an example simulation can be found in Marburg and Nolte (Eds.) - Computational Acoustics of Noise Propagation in Fluids (Springer, 2008), Chapter 4.
If you prepare a co-rotating vortex pair simulation, the resulting acoustic field is analytically known. It is also a good exercise to derive it from Lighthill analogy.
Otherwise a 2D cylinder flow or a 3D jet (SMC000 nozzle for example) are common best practices with increasing difficulty (and complexity).
As Fabrice suggests, NASA's CAA workshop on benchmark problems are a good resource. The problems and solutions from the first workshop (there have been 4 in total) are available at the attached link.
https://ntrs.nasa.gov/search.jsp?R=19950023713
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