Spiral flow meter | What is the difference between turbine and vortex gas flow meter?

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1. Working principle of vortex flowmeter

The flow profile of the flow sensor is similar to the profile of a Venturi tube. Place a set of spiral guide vanes on the inlet side, which force the fluid to generate intense vortex flow when it enters the flow sensor. When the fluid enters the diffusion section, the vortex flow is subjected to backflow and begins to undergo secondary rotation, forming a gyroscopic vortex precession phenomenon. The precession frequency is proportional to the flow rate and is not affected by the physical properties and density of the fluid. By measuring the secondary rotation precession frequency of the fluid with the detection element, good linearity can be obtained over a wide range of flow conditions. The signal is amplified, filtered, shaped, and converted into a pulse signal proportional to the flow rate by a pre roll amplifier, and then sent to the microprocessor for integration processing along with temperature, pressure, and other detection signals. Finally, the measurement results (instantaneous flow rate, cumulative flow rate, temperature, pressure data) are displayed on the LCD screen. The structure of the vortex flowmeter is compact, mainly composed of a housing, a vortex generator, sensors (temperature, pressure, flow), a rectifier, a bracket, and a converter. The usage conditions of the rotary vortex gas flowmeter are: ambient temperature: -30 ℃~+55 ℃ relative humidity: 5%~95% medium temperature: -30 ℃~+80 ℃ atmospheric pressure: 86kPa~106kPa

2. What is the difference between a turbine and a rotary vortex gas flowmeter?

The difference between vortex flowmeter and vortex flowmeter. Vortex flowmeter is a device that sets a stagnation piece in the flowmeter pip

eline. When the fluid flows through the stagnation piece, two asymmetric vortices will be generated downstream due to the stagnation effect on the surface of the stagnation piece. These vortices will separate on the side and rear of the stagnation piece, forming a so-called Karman vortex column. The rotation direction of the two vortices is opposite. Karman theoretically proved that when h/l=0.281 (h is the width between two vortex columns, and l is the distance between two adjacent vortices), the vortex column is stable. In this case, the frequency of vortex generation The relationship between f and the fluid velocity υ in the flowmeter pipeline is: f=sv/dv=df/s, where d represents the diameter of the cylindrical stagnation component; S - dimensionless constant, called Strouhal number, related to the Reynolds number re of the fluid flow state. The Reynolds number re of a circular cross-section pipeline with a flow meter is: where υ - the flow velocity of the fluid, m/s； ρ - density of fluid, kg/m3； μ - dynamic viscosity of fluid, (kg?m-1)/s。 And the flow rate of the fluid: q=a * v can be seen from the above equation. After the selection and design of the vortex flowmeter, the flow rate q is not only related to f, but also to the Reynolds number re. The Reynolds number re is a dimensionless number that characterizes the flow characteristics of viscous fluids, and its physical meaning is the ratio of the inertial force to the viscous force of fluid flow. Therefore, the flow state of the fluid also has a certain impact on the use of vortex flowmeters. If environmental parameters have an impact on the fluid flow state, it will also affect the performance of the vortex flowmeter. When the fluid flow sensor of the vortex flow

Spiral flow meter | What is the difference between turbine and vortex gas flow meter?

1. Working principle of vortex flowmeter

2. What is the difference between a turbine and a rotary vortex gas flowmeter?

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