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Curved wall diffuser

Curved wall diffuser d 2 d 1 l
Curved wall diffuser

Values for calculation

d_1 \mathrm{mm}
d_2 \mathrm{mm}
l \mathrm{mm}

Calculation

Diameter ratio

β=\cfrac{d_1}{d_2}

0.1< β^2< 0.9

Coefficient φ_0

φ_0=1.01-0.624\cdot\cfrac{l}{d_1}+0.3\cdot\left(\cfrac{l}{d_1}\right)^2-0.074\cdot\left(\cfrac{l}{d_1}\right)^3+0.007\cdot\left(\cfrac{l}{d_1}\right)^4

Loss coefficient

ζ=φ_0\cdot\left(1.43-1.3\cdotβ^2\right)\cdot\left(1-β^2\right)^2

Discharge coefficient

μ=\cfrac{1}{\sqrt{ζ+1}}