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90° curve and elbow

Input data

Flow

Diameter

Radius

Output data

Head loss

Description

Performs head losses calculations in curves with a known value of $\frac{R}{D}$, and in elbows ($\frac{R}{D}$ = 1). There are two options:

$\frac{R}{D}$
1
1.5
2
4
6
8
k
0.48
0.36
0.27
0.21
0.27
0.36

Given the flow

Given the flow, the pipe diameter and the relation $\frac{R}{D}$, calculates the corresponding head loss.

Coefficient

Given the pipe diameter and the relation $\frac{R}{D}$, calculates the head losses coefficients corresponding to the expressions:

  1. k applicable to the expression: $$ h_f = k. \frac{U^2}{2g} $$

  2. kQ applicable to the expression: $$ h_f = k_Q. Q^2

    $$ 90° curve90° curve

References

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