Thin Perforated Plate Head Loss Coefficient Equation and Calculator

Fluids Flow Engineering
Hydraulic & Pneumatic Design Engineering

Head loss and head loss coefficient equation and calculator of a fluid in across a thin perforated plate (plate thickness / hole hydraulic diameter < 0.015) inside a pipe. Reynolds number is assumed greater than 105 .

Head loss and head loss coefficient equation and calculator of a fluid in across a thin perforated plate

 

The head loss hLcan be calculated as:

hL= kloss x (um2 / (2 x g) )

Where k loss is the head loss coefficient, (um is the mean flow velocity in the pipe, and g is the gravitational acceleration. kloss is calculated from:

k loss equation

Where:

um = Flow Velocity m/s
hL = Head Loss (m)
kloss = Head Loss - dimension less
FAR = Free or Open Area / Total Area
g = 9.80665 m/s2 or 32.174 ft/s2

References

Idel'chik, I E. and Fried, Erwin., Flow Resistance, a Design Guide for Engineers , Taylor & Francis, Washington D.C. 1989. p 260.

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