Disadvantages of vortex flowmeter| Chenzhou ultrasonic flowmeter manufacturer

『Disadvantages of vortex flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. What are the main advantages and disadvantages of a vortex flowmeter?

1. Advantages: (1) The vortex flowmeter has a simple structure and is easy to install and maintain; (2) No movable parts, high reliability; (3) Lightweight and affordable, it is a relatively economical flowmeter. Its basic performance is at a medium to high level, and the purchase cost is lower than that of mass flow meters, electromagnetic flow meters, volumetric flow meters, etc., while the installation, operation, maintenance and other costs are lower than those of differential pressure flow meters, volumetric flow meters, turbine flow meters, etc. If it is only used as a control system detection instrument, dry calibration can also be adopted, which can save the cost of periodic calibration; (4) Strong adaptability, diverse structural forms, capable of measuring various fluid media such as liquids, gases, high-temperature vapors, low-temperature liquids, and partially miscible fluids; (5) Within a certain Reynolds number range, the output frequency signal is not affected by fluid properties (density, viscosity) and composition, that is, the instrument coefficient is only related to the shape and size of the vortex generator and pipeline, and the output signal is proportional to the flow rate. The range width is 10:1~20:1, and the accuracy level is high. Liquids are generally between 0.5 and 1.5 levels, gases are generally between 0.5 and 2 levels, and there is no zero drift; (6) Low pressure loss; (7) Verified in a typical medium and applicable to various media; (8) Dry rolling calibration can be achieved by determining the relationship between the Strouhal number and the geometric parameters of the generating body;

2. D

isadvantages (1) Vortex flowmeters are not suitable for measuring low Reynolds numbers (Red ≥ 2 × 104), and therefore are not suitable for measuring low flow rates, small diameters, and high viscosity fluids.

. When the Reynolds number is low, the Strouhal number varies with the Reynolds number, and the linearity of the instrument deteriorates. High fluid viscosity can significantly affect or even hinder the generation of vortices. One limitation of the selection is that it cannot be used below the critical Reynolds number. (2) The stability of vortex separation is affected by flow velocity distribution distortion and rotational flow. Sufficient straight pipe sections should be configured according to different forms of flow barriers on the upstream side. When space is limited, flow straighteners should be installed. Generally, the straight pipe section length requirements of differential pressure flow meters can be referenced for installation. (3) Except for thermal and ultrasonic flow meters, other types of vortex flowmeters are sensitive to mechanical vibration in pipelines and are not suitable for use in high vibration environments. (4) Compared with turbine flow meters, the instrument coefficient is lower, the frequency is lower, and the larger the diameter, the lower the diameter. Therefore, the instrument diameter should not be too large, generally not exceeding 300mm. (5) Vortex flow meters are suitable for many fluids, but attention should be paid to the dirty nature of the fluid. The fluid containing solid particles will generate noise and wear the vortex generator when it is washed away. If the short fibers contained are wrapped around the vortex generator, it will change the instrument coefficient. (6) The

Disadvantages of vortex flowmeter

1. What are the main advantages and disadvantages of a vortex flowmeter?

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