Do not settle for a blurry, bootleg PDF. Access the VKI library legitimately, or purchase a copy of "Principles of Turbomachinery" by R. K. Turton which cites Moustapha extensively. Invest in the correct engineering data, and your turbine will fly.
Each type of turbine has its advantages and disadvantages. Axial And Radial Turbines By Hany Moustapha.pdf