9.4 Francis and Kaplan Turbines: Reaction Turbines
337
variation with the Kaplan turbine with Ω s = 3 and only adjustable rotor blades is
comparable to that of a Francis turbine with Ω s = 1 (not explicitly shown). An axial
turbine with adjustable stator vanes, but fixed rotor blades (called propeller turbine
in the figure), has a very sharp efficiency variation.
9.4.7 Examples (Figs. 9.16, 9.17)
Fig. 9.17 Kaplan turbine
rotor Ω s ≈ 3. (Courtesy
ANDRITZ HYDRO)
Fig. 9.16 Francis turbine
rotor Ω s ≈ 1. (Courtesy
ANDRITZ HYDRO)
337
variation with the Kaplan turbine with Ω s = 3 and only adjustable rotor blades is
comparable to that of a Francis turbine with Ω s = 1 (not explicitly shown). An axial
turbine with adjustable stator vanes, but fixed rotor blades (called propeller turbine
in the figure), has a very sharp efficiency variation.
9.4.7 Examples (Figs. 9.16, 9.17)
Fig. 9.17 Kaplan turbine
rotor Ω s ≈ 3. (Courtesy
ANDRITZ HYDRO)
Fig. 9.16 Francis turbine
rotor Ω s ≈ 1. (Courtesy
ANDRITZ HYDRO)