Wind Tunnel Testing

Francesco Nicolosi

Greetings,I'm sorry but I can Speak only a little English I'm running a 2D-CFD model of an entire wind tunnel. The solution converges but my velocity profiles are not comparable to experiment.The Wind tunnel has a square section. It is a closed loop wind tunnel. this is the layout: 1)test section 2) first diffuser 3) corner with 24 turning vanes 4)corner with 24 turning vanes 5) Fan 6)second diffuser 7) Corner With 24 turning vanes 8) Corner with 24 turng vanes 8) Settling area with a Honeycomb and tree turbulence screen 9) Contraction Cone 10) Test Section. The speed at test section is 30 m/s. The speed at fan Section is 15 m/s. To calculate the losses, I used "Low speed Wind Tunnel Testing" by Barlow, Rae e Pope. When i run the simulation with Fluent 6.23, the drop of static pressure is not the same as calculated by me. Same for Speed