Bs-3680 Trapezoidal Flume, P3 = 3 - Siemens OCM III Instruction Manual

BS-3680 TRAPEZOIDAL FLUME, P3 = 3

'U' parameters required *
U0 = approach width
U1 = throat width
U2 = hump height
U3 = throat length
U4 = slope
*obtain from manufacturer's specifications.
**
calculated by OCM-3. May be viewed by accessing 'U' parameter.
Reference
ABSOLUTE CALCULATION, P4 = 0
For flows that can be calculated by the equation:
1.5 0.5
q = (2/3) x g x Cv x Cs x Cd x b x h
where : q = flow rate
g = gravitational acceleration
b = throat width
h = head
RATIOMETRIC CALCULATION, P4 = 1
For flows that can be calculated by the equation:
q = q x Cs/Cs x Cd/Cd
cal cal
where :
q = flow rate
q = flow rate at maximum head
cal
h = head
h = maximum head
cal
Cs = shape coefficient for head
¤
Refer to Operation \ Flow Calculation.
7ML19985AB01
B
b
p
L
m
¤
1.5
¤
x Cv/Cv x (h/h
al cal cal
Cs
cal
Cv = velocity coefficient
Cv
cal
Cd = discharge coefficient for head
Cd
cal
OCM III
'U' parameters calculated **
U5 = Cv
U6 = Cd
U7 = Cs
U8 = A
Cv = velocity coefficient
Cs = shape coefficient
Cd = discharge coefficient
1.5
)
= shape coefficient for maximum head
= velocity coefficient for maximum head
= discharge coefficient for maximum head
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