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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}}