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Thick-edged orifice

Thick-edged orifice d d o t
Thick-edged orifice

Values for calculation

d \mathrm{mm}
d_o \mathrm{mm}
t \mathrm{mm}

Calculation

Coefficient C_{th}

C_{th}=\left[1-0.5\cdot\left(\cfrac{t}{1.4\cdot d_o}\right)^{2.5}-0.5\cdot\left(\cfrac{t}{1.4\cdot d_o}\right)^{3}\right]^{4.5}

Loss coefficient

ζ=0.183+C_{th}\cdot\left[1.622-\left(\cfrac{d_o}{d}\right)^2\right]^2+\left(1-C_{th}\right)\cdot\left\{0.387+\left[1-\left(\cfrac{d_o}{d}\right)^2\right]^2\right\}

Discharge coefficient

μ=\cfrac{1}{\sqrt{ζ+1}}