Laminar/Turbulent BL over a cilinder

Rodge

Hello, I'm having trouble with the flow over a cilinder. I ran some wind tunnel tests first and then I tried to simulate the same case in Fluent. In Anderson's "Introduction to Aerodynamics" there is a figure with experimental and theoretical cases of pressure coeficients over a cilinder for different Reynolds numbers. With the same boundary conditions I get different kinds of flow: Wind tunnel case is subcritical and CFD is supercritical. Am I doing something wrong, or is Fluent not capable of a good prediction of the laminar/turbulent boundary layer transition? Thanks in advance. (Coupled/implicit/2 layer model, Spalart-Allmaras and K-omega turbulence model speed 30m/s turbulence 0.5% 23% area blockage)