GATE ME 2025 Set 1 — Question 53
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Turbomachinery → Hydraulic Turbines & Pumps → Pelton, Francis & Kaplan
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Question
Consider a Pelton wheel of diameter. The magnitude of relative velocity of water at the bucket inlet is same as the magnitude of relative velocity of water at the bucket exit. The absolute speed of water at the bucket inlet is . For maximum power output from the Pelton wheel, the rpm of the Pelton wheel is __________________ (rounded off to 1 decimal place).
Correct answer
1197 to 1203
Solution
1.For maximum power output of a Pelton wheel, the bucket speed should be half of the jet speed .
.2.Bucket speed , where .
.
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