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Flow nozzle

Flow nozzle d d T r 1 r 2 l T
Flow nozzle

Values for calculation

$d$ $\mathrm{mm}$
$d_T$ $\mathrm{mm}$
$r_1$ $\mathrm{mm}$
$r_2$ $\mathrm{mm}$
$f_T$
$l_T$ $\mathrm{mm}$

Calculation

Radius

$$r=\sqrt[3]{r_1^2\cdot r_2}$$

$$r/d_T< 1$$

Diameter ratio

$$β=d_T/d$$

Jet contraction ratio

$$λ=1+0.622\cdot\left(1-0.3\cdot\sqrt{\cfrac{r}{d_T}}-0.7\cdot\cfrac{r}{d_T}\right)^4\cdot\left(1-0.215\cdot β^2-0.785\cdot β^5\right)$$

Loss coefficient

$$ζ=0.0696\cdot\left(1-0.569\cdot\cfrac{r}{d_T}\right)\cdot\left(1-\sqrt{\cfrac{r}{d_T}}\cdot β\right)\cdot\left(1-β^5\right)\cdot λ^2+\left(λ-β^2\right)^2+f_T\cdot\cfrac{l_T}{d_T}$$

Discharge coefficient

$$μ=\cfrac{1}{\sqrt{ζ+1}}$$