Loading [MathJax]/extensions/MathZoom.js
Menu

Nozzle/Venturi

Nozzle/Venturi d d T d E l T l D α D r
Nozzle/Venturi

Values for calculation

$ d $ $ \mathrm{mm} $
$ d_T $ $ \mathrm{mm} $
$ d_E $ $ \mathrm{mm} $
$ r $ $ \mathrm{mm} $
$ f_T $
$ l_T $ $ \mathrm{mm} $
$ f_D $
$ l_D $ $ \mathrm{mm} $
$ α_D $ $ \mathrm{°} $

Calculation

Diameter ratio

$$β=d_T/d$$

Diameter ratio for the stepped diffuser

$$β_E=d_T/d_E$$

$$0\le β_E\le 1$$

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

$$ζ=0.0696\cdot\left(1-0.569\cdot\cfrac{r}{d_T}\right)\cdot\left(1-\sqrt{\cfrac{r}{d_T}}\cdot β\right)\cdot\left(1-β^5\right)\cdot λ^2+\left(λ-1\right)^2+f_T\cdot\cfrac{l_T}{d_T}+8.3\cdot\left(\tan{\left(α_D/2\right)}\right)^{1.75}\cdot\left(1-β_E^2\right)^2+\cfrac{f_D\cdot\left(1-β_E^4\right)}{8\cdot\sin{\left(α_D/2\right)}}+\left(β_E^2-β^2\right)^2$$

Discharge coefficient

$$μ=\cfrac{1}{\sqrt{ζ+1}}$$