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Selected Topics from Hydraulics
Definitions and Terminology
Theory of the Centrifugal Pump Impeller
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affinity laws airfoil axial flow impeller axial flow pumps axial thrust Bernoulli's equation brake horsepower cavitation pitting cent centrifugal pump check valve clearance coefficient condensate pumps constant critical speed cut-water deflection diagram diffusion vane disk friction effect energy gradient entrance equal equation Euler's Euler's equation Figure friction loss head-capacity curve high specific speed higher hydraulic efficiency hydraulic losses impeller diameter impeller eye impeller vanes increase jet pump leakage liquid maximum motor multistage pumps normal NPSH number of vanes obtained parabola pipe line resistance prerotation pressure rise pressure wave propeller pumps radial reduced result Reynolds number rotation rotor shaft shown in Fig shows shut-off head specific speed pumps static streamlines stuffing box suction suction pipe tangential component temperature throttling tion torque total head valve closure vane angle vapor velocity distribution velocity triangle vibration viscosity volute water hammer water turbine zero capacity