Photo of Vortex Flow Meter Probe | Structural Analysis of Vortex Flow Meter | Manufacturers Interpretation

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1.1 minutes to understand the working principle of vortex flowmeter

The working principle of vortex flowmeter is based on the "Karman vortex street" principle. The following is a detailed explanation of its working principle:

First, the basic principle of the vortex flowmeter is a fluid oscillation type flow meter developed based on the "Karman vortex street" principle, which has excellent technical performance indicators. When fluid flows through a non streamlined cylindrical object (vortex generator) inserted into the sensor housing, two columns of staggered vortices will be generated on both sides behind the cylinder. The separation frequency of these vortices is proportional to the flow velocity and inversely proportional to the width of the cylinder.

2. The relationship between vortex separation frequency and flow velocity. The frequency f of vortex separation can be expressed by the following formula: f=St × V/d, where f is the vortex separation frequency; St is a dimensionless constant (Strouhal number), which is a function of Reynolds number Re within a certain flow range for a specific type of vortex generator; V is the average flow velocity of the fluid inside the pipeline; D is the width of the upstream face of the cylinder; D is the inner diameter of the sensor housing (this parameter is not directly reflected in the formula, but affects the relationship between St and Re). By detecting the separation frequency f, the fluid flow velocity and instantaneous flow rate can be measured.

III. Calculation of Instrument Coefficient The number of pulses generated by the flow of fluid through a sensor per unit volume is called the instrument coefficient, represented by K. The instrument c

oefficient K can be calculated using the following formula: K=N/Q, where K is the instrument coefficient; N is the number of pulses; Q is the volume of the fluid. Four shirt chains, signal detection, and the principle of dealing with major problems: vortices alternate and separate on both sides behind the cylinder, generating pressure pulsations and subjecting the detection object (also known as the probe) in the sensor to alternating forces. The piezoelectric crystal element embedded in the detection body generates a charge frequency signal under the action of alternating force. These signals are processed by the detection circuit and output in the form of frequency signals or converted into standard signal forms. After matching the flow accumulation instrument and temperature and pressure sensors, the parameters can be corrected and calculated. 5. Image Display Diagram (1): Karman Vortex Street Diagram (2): Relationship Diagram between St and Re (3): Detection of Charge Frequency Signal Generated by Alternating Force on Piezoelectric Crystal Elements in the Body. 6. Summary: Vortex Street Flowmeters use piezoelectric stress sensors, which have the advantages of high reliability and easy compatibility with digital systems such as computers. Its working principle is based on the "Karman vortex street" principle, which measures fluid flow velocity and instantaneous flow rate by detecting the vortex separation frequency. In practical applications, it is necessary to choose the appropriate type of flowmeter according to the specific situation.

2. Swiss E+H Endershause Vortex Flow Meter F 200, 7F2C80, DN80 3 "Introduction

Swiss E+H Endershause Vortex Flow Meter F 200, 7F2C80, DN80 3" Introduction: Swiss E+H En

Photo of Vortex Flow Meter Probe | Structural Analysis of Vortex Flow Meter | Manufacturers Interpretation

1.1 minutes to understand the working principle of vortex flowmeter

2. Swiss E+H Endershause Vortex Flow Meter F 200, 7F2C80, DN80 3 "Introduction

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