Compressibility correction for SST model

[sun5k]

Proposed Changes

Compressibility Correction(CC) for the k-w SST model.

Two kind of CC is implemented. Both CC were based on Wilcox's book(Turbulence Modeling for CFD 3rd) and the paper of Rumsey

The k-w SST model transport equation :

*The production term is according to version or options for SST model(SU2 ver 8.0.1 has 1994m or 2003m).

1. Wilcox The H is the Heaviside function.

2. Sarkar In the Sarkar's CC, the pressure dilatation() is considered. The k transport equation is :

Validation Case

Validation analysis is conducted for the hypersonic flat plate. Two different wall temperature(T_w/T_free = 1.090 and T_w/T_free = 2.725) results are presented and compared with simulation results of ANSYS Fluent.

The CC of Fluent and Wilcox is almost same, but they have different coefficients(Wilcox : / Fluent : ). So, The results show a similar behavior to the Fluent results.

PR Checklist

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• [x] I am submitting my contribution to the develop branch.
• [x] My contribution generates no new compiler warnings (try with --warnlevel=3 when using meson).
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• [x] I used the pre-commit hook to prevent dirty commits and used pre-commit run --all to format old commits.
• [x] I have added a test case that demonstrates my contribution, if necessary.
• [x] I have updated appropriate documentation (Tutorials, Docs Page, config_template.cpp), if necessary.