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Beveled orifice

Beveled orifice d d o ψ l
Beveled orifice

Values for calculation

$d$ $\mathrm{mm}$
$d_o$ $\mathrm{mm}$
$l$ $\mathrm{mm}$
$ψ$ $\mathrm{°}$

Calculation

Coefficient $ C_b $

$$C_b=\left(1-\cfrac{ψ}{90}\right)\cdot\left(\cfrac{ψ}{90}\right)^{\cfrac{1}{1+l/d_o}}$$

Jet contraction ratio

$$λ=1+0.622\cdot\left[1-C_b\cdot\left(\cfrac{l}{d_o}\right)^{\cfrac{1-\sqrt[4]{l/d_o}}{2}}\right]$$

Loss coefficient

$$ζ=0.0696\cdot\left(1-C_b\cdot\cfrac{l}{d_o}\right)\cdot λ^2+\left[λ-\left(\cfrac{d_o}{d}\right)^2\right]^2$$

Discharge coefficient

$$μ=\cfrac{1}{\sqrt{ζ+1}}$$