In Example VIc.5.1, we derived the efficiency of a Pelton
wheel in terms of Vw, Vt, and _. Use a deflection
angle of 165o , vw = , and Vt = _R, as
shown in Figure VIc.5.1 and show that the Pelton wheel works most effectively
when running at half the speed of the jet of water. Find the maximum
efficiency. Comment on the actual Pelton wheel efficiency.
Example VIc.5.1. Derive the efficiency of the Pelton wheel
in terms of the constant velocities Vj, Vt, and the jet reflection angle of
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