A twin jet Pelton wheel has a mean runner diameter of 1.68 m & runs at 500rpm, each jet is of dia. 152 mm. The net head is 510 m. Bucket turns the jet through 1650 & relative velocity is reduced by 12% when it flows over the bucket. Windage & mechanical losses are 3% of the water power supplied. Nozzle co-efficient = 0.98. Find:

i) Water power supplied. ii) Brake power. iii) Force of each jet on bucket. iv) Overall efficiency.

  • $\begingroup$ Bucket turns the jet through 165 degrees $\endgroup$
    – Pranith
    Feb 12, 2023 at 11:08
  • 1
    $\begingroup$ Hint: P = Qgh where q is flow rate, g is gravity and h is head. $\endgroup$
    – Solar Mike
    Feb 12, 2023 at 11:28
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    $\begingroup$ @Pranith edit the post ... do not write a comment that makes a correction ... also, please add a clear, answerable question to your post $\endgroup$
    – jsotola
    Feb 12, 2023 at 18:33


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