The guide emphasizes that is the ultimate selector. An ( N_s ) below 500 indicates a radial pump; above 10,000 indicates an axial propeller.
Selection starts with understanding how the fluid moves through the machine: taylorandfrancis.com Axial Flow turbomachines a guide to design selection and theory pdf
O.E. Balje’s 1981 text, Turbomachines: A Guide to Design, Selection and Theory The guide emphasizes that is the ultimate selector
): A dimensionless parameter grouping speed, flow rate, and head to identify the ideal machine geometry. Modern Computer-Aided Engineering (CAE) Turbomachines: A Guide to Design
These machines add kinetic and pressure energy to the fluid. Examples include compressors, fans, blowers, and pumps.