I am doing a academic project on validation of Centrifugal blower CFD analysis with the experimental data. Here my objective is to match the performance curve (Static pressure versus Volume flow rate) obtained from CFD analysis with that of experimental data.
I am using CFX solver, steady state analysis and SST turbulence model, with pressure inlet (Total pressure) and pressure outlet (Average static pressure) condition and as my interest here is to obtain the volume flow rate.
I have run simulations at different outlet average static pressure conditions, and observed that the CFD is under-predicting the flow at the higher static pressures. The difference between the experimental and CFD performance curve is around 20%.
How can i reduce this gap?
Would you suggest me to go with a different solver as well as a different Turbulence model?