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Contraction
Given the flow
Coefficient

Input data

Flow

Diameter 2

β

Output data

Head loss

Description

Performs head losses calculations in contraction. There are two options:

Given the flow

Given the flow, the outlet diameter of the contraction and the reduction angle, calculates the corresponding head loss.

hf=k.U22g h_f = k. \frac{U^2}{2g}

Coefficient

Given the outflow pipe diameter and the reduction angle, calculates the head losses coeficients corresponding to the expressions:

  • k applicable to the expression:
    hf=k.U22g h_f = k. \frac{U^2}{2g}
  • kQ applicable to the expression:
    hf=kQ.Q2 h_f = k_Q. Q^2

Contraction

References

  • Silvestre, Paschoal. Hidráulica geral. Rio de Janeiro, LTC, 1979.