Turbomaquinas Hidraulicas-claudio Mataix

These machines add energy to the fluid. The shaft does work on the water to increase its pressure or velocity.

Mataix dedicates significant effort to the dimensionless specific speed parameter. He shows that $N_s$ dictates the shape of the impeller. Low $N_s$ = radial (Pelton/Centrifugal). High $N_s$ = axial (Kaplan/Propeller). turbomaquinas hidraulicas-claudio mataix