I am trying to design axial flow fans, but the only reference I have found in my library is in Karassik's Pump Handbook.
He references the method devised by Hill and Peterson and another one by Steppanoff, based on NACA airfoil data. I can't found any of their books and Mr. Karassik didn't find it worthy to describe any method in his book.
Still, I bet there are some free resources out there. I have tried everywhere and googled a lot but can't find them.
Have you got any website or pdf you could send me?