Linear Flow Orifice Meter Equations
Total Flow Rate Through Weir
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$$ Q = C_o [h +
Unknown macro: {2 over 3}
s] $$
The constant of proportionality, Co :
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$$ C_o = C_d W \sqrt
Unknown macro: {2 g s}
= {Q_
Unknown macro: {max}
\over H_{dmax}}$$
Flow Through Rectangular Base of Weir
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$$ q_w =
Unknown macro: {2 over 3}
W C_d \sqrt
Unknown macro: {2g}
[{{(h + s)}^{3 \over 2}} - {h^{2 \over 3}}] $$
Rectangular Base Width
Unknown macro: {latex} $$ W = Q_max \over {C_d {H_dmax^{3 \over 2}} \sqrt{3 g Pi_Sutro}} $$
Rectangular Base Height
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$$ s =
Unknown macro: {3 over 2}
\Pi_
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H_
Unknown macro: {dmax}
$$
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$$ Pi_
Unknown macro: {sutro}
=
Unknown macro: {Q_min over Q_max}
= {{2 \over 3}s} \over
Unknown macro: {H_dmax}
$$
Profile of Curved Portion
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$$ y =
Unknown macro: {W over 2}
[1 -
Unknown macro: {s over Pi}
tan^{-1} \sqrt
Unknown macro: {x over s}
]$$