Model a impeller by Bladegen
 

hi guys
i want to model a impeller with these given parameters:
Flow rate , RMP, TDH , efficiency , impeller dia. in addition i have performance curve of its related pump.
i used bladegen but i have many parameters that i havent. now i ask you, how can i estimate unkown parameters such as inlet and oulet angles , eye diameter and impeller width and etc.
my goal in this step is modeling this impeller so that the obtained performance curve of simulation have a significant agreement with practical curve that the pump vendor has published.
thnX