Head loss coefficient in orifices and strainers

voima toolbox

Recommendations

Backwash head loss in Pluvitec Master pipes

Default

Input data

Area

Discharge coefficient

Output data

kQ

Description

The pressure loss coefficient in orifices and strainers is calculated based on the orifice area and the discharge coefficient. This coefficient is crucial for determining head loss in hydraulic systems with restricted openings.

The fundamental equation used in the calculation is:

h_f = k_Q \cdot Q^2

where:

$h_f$ is the head loss (m)
$k_Q$ is the pressure loss coefficient
$Q$ is the flow rate (m³/s)

The equation used to calculate $k_Q$ is:

k_Q = \frac{1}{(C_d \cdot A)^2} \cdot \frac{1}{2g}

where:

$A$ is the orifice area (m²)
$C_d$ is the discharge coefficient
$g$ is the gravitational acceleration (m/s²)

Input and Output Parameters

Inputs

Parameter	Standard Units	Description
Area ( $A$ )	m²	Orifice opening area
Discharge coefficient ( $C_d$ )	-	Flow efficiency factor

Output

Parameter	Standard Units	Description
$k_Q$	-	Pressure loss coefficient

Calculations