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A partially open sluice gate discharges water into a rectangular channel. The tail water depth
formed at a downstream of the sluice gate after the vena contracta of the jet coming out from the sluice gae, the sluice gate opening should be (coefficient of contraction Cc = 0.9)in the channel is 3 m and Froude number is 1 . If a free hydraulic jump is to be 2 √2
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- 0.3 m
- 0.4 m
- 0.69 m
- 0.9 m
- 0.3 m
Correct Option: C
| y1 = | [-1 + √1 + 8Fr22] | |
| 2 |
= 0.62 m
Coeff. of contraction, Cc
| Cc = | ||
| area of opening |
| ⇒ 0.9 = | ||
| y × b |
| ∴ y = | = 0.69 m | |
| 0.9 |
