+1 vote
in Irrigation Engineering by (75.2k points)
A very steady and stable hydraulic jump is usually formed in the flows involving the approaching Froude number in the range of _____________________

(a) less than 2.5

(b) 2.5 to 4.5

(c) 4.5 to 9.0

(d) more than 9.0

The question was posed to me by my college director while I was bunking the class.

The origin of the question is Energy Dissipation Below Overflow Spillway in portion Spillways, Energy Dissipators and Spillway Gates of Irrigation Engineering

1 Answer

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by (106k points)
Right choice is (c) 4.5 to 9.0

The best explanation: When the Froude number is in the range of 4.5 to 9.0, the jump performs at its best and is called steady jump. The length of the jump is almost constant and equal to 6 y2 where y2 is the post jump depth. The dissipation of energy ranges from 45 to 70%.

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