Menu

Share-edged contraction

Share-edged contraction d 2 d 1
Share-edged contraction

Values for calculation

$d_1$ $\mathrm{mm}$
$d_2$ $\mathrm{mm}$

Calculation

Diameter ratio

$$β=\cfrac{d_2}{d_1}$$

Jet contraction ratio

$$λ=1+0.622\cdot\left(1-0.215\cdotβ^2-0.785\cdot β^5\right)$$

Loss coefficient

$$ζ=0.0696\cdot\left(1-β^5\right)\cdot λ^2+\left(λ-1\right)^2$$

Discharge coefficient

$$μ=\cfrac{1}{\sqrt{ζ+1}}$$