XNLUGB series vortex flowmeter

Product Profile

LUGB vortex flowmeter is widely used in industrial pipelines of petroleum, chemical, power, light industry and other sectors to measure the flow rate of liquids or gases. Due to the sensor material being 1Cr18Ni9Ti, it can also be used for flow measurement of fluid pipelines in urban water supply, heating, boiler water supply, and medical industries.

Working principle

The LUGB vortex flowmeter is a flow meter that uses the Karman vortex principle to measure steam, gas, and low viscosity liquids. When a fluid flows through a vortex generator placed perpendicular to the flow direction of the measured medium, two rows of vortices are alternately generated on both sides behind it, which is called a Karman vortex street. The frequency f generated by the vortex is related to the average velocity V flowing through both sides of the vortex generator and the width d of the upstream face of the vortex generator as follows:

f＝St×V÷d

Where

f: Vortex frequency, HZ；

St: Strouhal number

V: The average velocity of the fluid flowing through the vortex generator, m/s；

d: For the characteristic width of the vortex generator, m。

The Strouhal number St is related to the shape of the generator and the Reynolds number ReD. The Reynolds number of the medium inside the pipeline is maintained within the range of 2 × 104 to 7 × 106, and the Strouhal number St can be regarded as a constant to ensure measurement accuracy. By detecting the frequency f of vortex generation through piezoelectric elements within this interval, the average flow velocity can be calculated. Then, the working volume flow rate of the fluid can be calculated based on the flow velocity. By knowing the density of the medium (which is related to temperature and pressure), the mass flow rate of the medium can be accurately calculated.

Detailed parameters

IP65 or high (customizable)