Question
Download Solution PDFThe losses of energy in pipes is due to the
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Major losses:
The major loss of energy or head is due to friction.
It is calculated by
- Darcy-Weisbach formula
- Chezy's formula.
Darcy-Weisbach formula
\(h_{f}={4fLv^2\over 2gD}\)
Where f = Coefficient of friction
L = Length of pipe, D = Diameter of pipe, v = Mean velocity of flow, g = Acceleration due to gravity
Chezy's formula
\(h_{f}=C({P\over A})Lv^2\)
Where C = Chezy's constant, P = Wetted perimeter, A = Area of flow, L = length of pipe, v = mean velocity of flow
Minor losses:
Minor energy (head) loss occurs in the following cases-
- Loss of head due to sudden enlargement.
- Loss of head due to sudden contraction.
- Loss of head due to an obstruction in the pipe.
- Loss of head at the entrance to a pipe.
- Loss of head at the exit to a pipe.
- Loss of head due to bend in the pipe, and
- Loss of head in various pipe fittings.
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