What are the differences between an intelligent vortex flowmeter and a turbine flowmeter

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What is the working principle of an intelligent vortex flowmeter??

The working principle of the intelligent vortex flowmeter is to set up a triangular column type vortex generator in the fluid, which alternately generates regular vortices with buried objects from both sides of the vortex generator. This type of vortex is called the Karman vortex street vortex, as shown in the right figure. The vortex columns are asymmetrically arranged downstream of the vortex generator.. Assuming the frequency of vortex occurrence is f, the average flow velocity of the measured medium is d, the width of the upstream face of the vortex generator is d, and the diameter of the body is D, the following relationship can be obtained: f=SrU1/d=SrU/md (1), where U1- the average flow velocity on both sides of the vortex generator, m/s； Sr Strouhal number; The ratio of the bow shaped area on both sides of the m - vortex generator to the cross-sectional area of the pipeline is qv, which is qv=π D2U/4=π D2mdf/4Sr (2) K=f/qv=[π D2md/4Sr] -1 (3). In equation K - the instrument coefficient of the flowmeter is the number of pulses/m3 (P/m3). K is not only related to the geometric dimensions of the vortex generator and pipeline, but also to the Strouhal number. The Strouhal number is a dimensionless parameter that is related to the shape of the vortex generator and the Reynolds number. Figure 2 shows the relationship between the Strouhal number of a cylindrical vortex generator and the Reynolds number of a pipeline. As shown in the figure, Sr can be regarded as a constant within the range of ReD=2 × 104 to 7 × 106, which is the normal operating range of the instrument. When measuring gas flow rate, the flow calculation formula for VSF i

s (4). In the relationship curve between Strouhal number and Reynolds number in Figure 2, qVn and qV - are the volumetric flow rates under standard conditions (0oC or 20oC, 101.325kPa) and operating conditions, respectively, m3/h； Pn, P - are the absolute pressures under standard and operating conditions, Pa; Tn, T - are the thermodynamic temperatures under standard and operating conditions, K; Zn, Z - are the gas compression coefficients under standard and operating conditions, respectively. As can be seen from the above equation, the pulse frequency signal output by VSF is not affected by fluid properties and composition changes, that is, the instrument coefficient is only related to the shape and size of the vortex generator and pipeline within a certain Reynolds number range. However, as a flowmeter in material balance and energy measurement, it is necessary to detect mass flow rate. At this time, the output signal of the flowmeter should simultaneously monitor volume flow rate and fluid density. Fluid properties and components still have a direct impact on flow measurement. The vortex flowmeter is a new type of flowmeter that measures fluid flow in closed pipelines based on the Karman vortex principle. Due to its excellent medium adaptability, it can directly measure the volumetric flow rate of steam, air, gas, water, and liquid without temperature and pressure compensation. Equipped with temperature and pressure sensors, it can measure standard volumetric flow rate and mass flow rate, making it an ideal alternative to throttling flow meters. In order to improve the high temperature resistance and vibration resistance of vortex flow meters, our company has recently developed the SDLU improved vortex flow sensor. Due

What are the differences between an intelligent vortex flowmeter and a turbine flowmeter

What is the working principle of an intelligent vortex flowmeter??

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