Principle of Vortex Flow Meter | Working Principle and Common Troubleshooting of Rosemount Vortex Flow Meter

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1. Working principle and product advantages of vortex flowmeter

The vortex flowmeter is based on the Karman vortex principle, which calculates the flow rate by measuring the alternating vortex frequency generated when the fluid flows through the vortex generator. It has the advantages of simple structure, wide measurement range, and strong medium adaptability, and is an ideal alternative to throttling flowmeters. Working principle core mechanism: Vortex flowmeter uses the oscillation principle of fluid for measurement. When a fluid flows in a closed pipeline and passes through a vortex generator (such as a triangular column), regular vortices are alternately generated on both sides, and the release frequency of these vortices is proportional to the fluid velocity. Calculation formula: By measuring the vortex frequency $f $and the characteristic width $d $of the vortex generator, combined with the Reynolds function $St $(when the Reynolds number $Re $is between $10 ^ 2 $and $10 ^ 5 $, $St approach 0.2 $), the average velocity $v $of the fluid can be calculated as $f=frac {St cdot v} {d} $. When $St=0.2 $, the formula is simplified to $f=frac {0.2v} {d} $, thereby directly deriving traffic data. Measurement process: The vortex generator is placed in the fluid → the fluid generates alternating vortices → the sensor detects the vortex frequency → the flow velocity and flow rate are calculated through formulas. The product has the advantages of simple structure and high reliability. The vortex flowmeter is composed of a small number of components such as vortex generator and sensor, and has a compact structure. After installation, it is not easy to cause pipeline leakage due to mechanical failure. No moving parts,

reducing wear and maintenance requirements, and strong long-term stability. When a fluid with small pressure loss flows through a vortex generator, the pressure change is gentle and will not cause significant pressure loss due to local contraction like a throttling flowmeter, thereby reducing system energy consumption. The measurement range is wide and suitable for a wide range of flow rates from low to high speeds, with a range ratio of up to $10:1 to $20:1, meeting the needs of different operating conditions. Strong adaptability to media, direct measurement of working condition volume flow rate: It can measure the working condition volume flow rate of various media such as steam, air, gas, water, and liquid without temperature and pressure compensation. Extended measurement function: equipped with temperature and pressure sensors, it can further calculate the volume flow rate and mass flow rate of potato liquid under standard conditions, suitable for tedious working conditions. Strong anti-interference ability, vortex frequency is linearly related to flow velocity, and is less affected by parameters such as fluid density and viscosity, resulting in accurate and reliable measurement results. Not sensitive to external disturbances such as vibration and temperature changes, suitable for harsh industrial environments. Burial leasing, installation, and maintenance are convenient, with small size, light weight, low installation space requirements, and support for horizontal, vertical, or inclined pipeline installation. Routine maintenance only requires regular checks of sensors and cleaning of vortex generators, making it easy to operate. Economic advantages: Low long-term operating costs, no need for frequent calibration or

Principle of Vortex Flow Meter | Working Principle and Common Troubleshooting of Rosemount Vortex Flow Meter

1. Working principle and product advantages of vortex flowmeter

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