Project ForgeFluid Mechanics
Bernoulli's Equation & Flow
GATE 2018
Medium
For a Pelton wheel with a given water jet velocity, the maximum output power from the Pelton wheel is obtained when the ratio of the bucket speed to the water jet speed is _______ (correct to two decimal places).
0.485(± 0.035 accepted)
Explanation
For an ideal Pelton wheel, the power delivered P ∝ u(V−u), which is maximized (dP/du=0) at bucket speed u = V/2, i.e., a bucket-to-jet speed ratio of 0.50.
Source: GATE ME 2018 Session 1 (Set 1) (2018)
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