What are the differences between vortex flowmeter and turbine flowmeter

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What is the formula for calculating the frequency and flow rate of a vortex flowmeter? In general, the flow equation of a turbine flowmeter can be divided into two types: practical flow equation and theoretical flow equation. Practical flow equation: qv=f/K formula 1; In the equation qm=qv ρ, qv and qm respectively represent volumetric flow rates, m3/s， mass flow rate kg/s; F is the frequency of the output signal of the flowmeter, Hz; K is the instrument coefficient of the flowmeter, P/m3。 According to the Instrumentation World Network, the coefficient of a turbine flowmeter can be divided into two segments, namely the linear segment and the nonlinear segment. The linear segment is about two-thirds of its working segment, and its characteristics are related to the sensor structure size and fluid viscosity. In the nonlinear segment, the characteristics are greatly affected by bearing friction and fluid viscous resistance. When the flow rate is below the lower limit of the sensor flow rate, the instrument coefficient changes rapidly with the flow rate. The pressure loss is approximately proportional to the square of the flow rate. When the traffic exceeds the upper limit, attention should be paid to preventing cavitation. The shape of TUF characteristic curves with similar structures is similar, with only differences in the level of systematic error. The characteristic curve of the turbine flowmeter is calibrated by a flow verification device, which completely disregards the internal fluid mechanism of the sensor. The sensor is treated as a black box, and its conversion coefficient is determined based on the input (flow rate) and output (frequency pulse signal), making it convenient for practical applications. However, it should be noted that the conversion coefficient (instrument coefficient) of this shirt is conditional, and its verification condition is a reference condition. If it deviates from this condition during use, the bridge coefficient will change depending on the sensor type, pipeline installation conditions, and fluid properties parameters. The theoretical flow equation of a turbine flowmeter can derive the motion equation of the impeller based on the moment of momentum. Flow rate V=3600F/K, where F is the frequency of the vortex flowmeter and K is the factory dust calibration coefficient of the vortex flowmeter.

2. What is the difference between vortex flowmeter, turbine flowmeter, and mass flowmeter? I measure natural gas (ordinary steel cylinder 20MPa after pressure reduction)

3. What are the differences between a vortex flowmeter and a turbine?

Firstly, the measurement principles are different.. Secondly, the measurement accuracy is also different: the vortex street measurement accuracy for liquids is 1.0, and the measurement accuracy for gases and vapors is 1.5; The maximum accuracy of measuring liquid with the vortex collapse flowmeter in the liquid reserve book is 0.2, which can also reach 0.5 in the imitation of Xiaohong; Measurement accuracy of gas 0.5.

4. What are the differences between vortex flowmeter and turbine flowmeter

The working principle of intelligent vortex flowmeter is based on the card large gate vortex principle, that is, the vortex frequency is proportional to the flow velocity. Its core component is an isosceles triangular cylinder located at the center of the pipeline, with its axis perpendicular to the direction of fluid flow. When fluid flows through

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