Disadvantages of vortex flowmeter| portable clamp on flow meter

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What are the disadvantages of vortex flowmeter?

1. Poor anti vibration performance. External vibrations can cause measurement errors in vortex flowmeters, and even prevent them from functioning properly. The high flow velocity impact of the channel fluid will cause additional vibrations in the cantilever of the vortex generator, resulting in a decrease in measurement accuracy. The impact of larger pipe diameter is more significant. 2. Poor adaptability to measuring dirty media. The generating body of the vortex based flowmeter is easily contaminated by the medium or entangled by dirt, which changes the geometric dimensions and greatly affects the measurement accuracy. 3. The straight pipe section requires high requirements. Experts point out that the straight section of the vortex flowmeter must ensure the first 40D and the last 20D to meet the measurement requirements. Vortex flow meters can generally only measure the wide flow rate of fluids in media below 300 ℃.

2. What are the main advantages and disadvantages of vortex flowmeters

1. Advantages: (1) Vortex flowmeters have a simple structure and are 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. Disadvantages (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 ups

Disadvantages of vortex flowmeter

What are the disadvantages of vortex flowmeter?

2. What are the main advantages and disadvantages of vortex flowmeters

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