Orifice Nozzle Venturi

Reference data and engineering information about orifice nozzle venturi for fluid mechanics applications.

orificenozzleventuriCalculatorData Table

Overview

Orifice plates, nozzles, and Venturi meters are differential pressure flow meters. They create a constriction that increases velocity and decreases pressure, allowing flow rate calculation from the pressure differential.

Key Formulas

Flow Rate

$Q = C_d A_2 \sqrt{\frac{2 \Delta P}{\rho (1 - \beta^4)}}$

Discharge through a differential pressure meter.

Beta Ratio

$\beta = \frac{d}{D}$

Ratio of throat diameter to pipe diameter.

Variables

Symbol	Description	Unit
$Q$	Volume flow rate	m³/s
$C_d$	Discharge coefficient	—
$A_2$	Throat area	m²
$\Delta P$	Pressure differential	Pa
$\rho$	Fluid density	kg/m³
$\beta$	Diameter ratio	—

Reference Data

4 rows

Comparison of differential pressure flow meters
meter
Orifice Plate
Venturi Meter
Flow Nozzle
Wedge Meter

Source: engineeringtoolbox.com

Orifice Flow Calculator

References

Original Source

Source: engineeringtoolbox.com