Linear Flow Orifice Meter Equations
Total Flow Rate Through Weir
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$$ Q = C_o [h + {2 \over 3} s] $$ |
The constant of proportionality, Co :
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$$ C_o = C_d W \sqrt{2 g s} = {Q_{max} \over H_{dmax}}$$ |
Flow Through Rectangular Base of Weir
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$$ q_w = {2 \over 3} W C_d \sqrt{2g} [{{(h + s)}^{3 \over 2}} - {h^{2 \over 3}}] $$ |
Rectangular Base Width
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$$ W = Q_max \over {C_d {H_dmax^{3 \over 2}} \sqrt{3 g Pi_Sutro}} $$ |
Rectangular Base Height
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$$ s = {3 \over 2} \Pi_{sutro}H_{dmax} $$ |
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$$ Pi_{sutro} = {Q_min \over Q_max} = {{2 \over 3}s} \over {H_dmax} $$ |
Profile of Curved Portion
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$$ y = {W \over 2} [1 - {s \over \Pi} tan^{-1} \sqrt{x \over s} ]$$ |
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{latex}
\large
q~w~ = 2/3 W C~d~
{latex}
can't figure this out yet will get it asap |