Hello,
During my work I had to do simulations with a precise turbulence level (5%) at one point. To achieve that, I used the K-Epsilon model (in both directions) with Telemac3D and I wrote subroutines adding an inlet profile (depending on the altitude) for inlet velocity, K and Epsilon.
Here are the source files and a text explaining my simulations.
Don't hesitate to write me if you have questions or if you want to use those developments. The source files are not very clean yet!
Vincent