Summarization
Vortex flowmeter is a flow measurement instrument based on the Karman vortex flowmeter principle, also known as vortex flowmeter or Karman vortex flowmeter.
It is mainly used to measure the volume flow of gas, steam or liquid in various pipelines. It is a new type of flow meter commonly used in industrial control, energy metering and energy saving management, and is widely used in industrial production, energy metering, environmental protection, transportation and other fields.
Working principle
Vortex flowmeter is an instrument that uses regular vortex stripping phenomenon to measure fluid flow.
When a non-streamlined column (cylinder or triangular column) is vertically inserted into the fluid as a vortex generator.
When the Reynolds number reaches a certain value, there will be two columns of alternating vortices in the downstream of the column, because these vortices are like street lights next to the street, so it is called "vortex street", this phenomenon was first discovered by Karman, also known as "Karman vortex street".
At the back of the object are neatly arranged vortices that turn in opposite directions along two parallel lines.
The number of these vortex rows, the vortex frequency, is proportional to the flow rate of the fluid. By measuring the frequency of the vortex, the flow rate of the fluid can be deduced, and the flow rate of the fluid can be calculated.
Product picture
Peculiarity
Vortex flowmeter is characterized by high precision, wide measuring range, no moving parts, no mechanical wear, easy maintenance, small pressure loss, energy saving effect is obvious.
However, the vortex flowmeter is not suitable for low Reynolds number, for high viscosity, low flow rate, the use of small diameter has limitations, the flowmeter installation should have enough length of the straight pipe section, the length of the upstream and downstream straight pipe section is not less than 20D and 5D, and should try to eliminate vibration.
The frequency of vortex in vortex flowmeter is not affected by temperature, pressure and viscosity, so it has high measurement accuracy.
Application field
The application range of vortex flowmeter is quite wide, mainly including the following areas:
Industrial production: In metallurgy, power, coal, chemical, petroleum and other industries, vortex flowmeters are used to measure and control the flow of various fluids (including gas, liquid and steam) to meet the needs of the production process.
Energy metering: In the field of energy measurement, vortex flowmeters can be used to measure the flow of primary energy (such as coal, crude oil, coal bed methane, liquefied petroleum gas and natural gas) and secondary energy (such as electricity, coke, artificial gas, refined oil, liquefied petroleum gas, steam) and energy-carrying working medium (such as compressed air, oxygen, nitrogen, hydrogen, water). It provides an important basis for scientific management of energy, realizing energy saving and consumption reduction and improving economic benefits.
Environmental protection: In the field of environmental protection, vortex flowmeters can be used to monitor and control the discharge flow of flue gas, waste liquid, sewage, etc., which helps to improve the quality of atmospheric and water resources.
Transportation: In the field of transportation, vortex flowmeter is a key tool for control, distribution and scheduling in pipeline transportation, and can achieve accurate control and management of the transportation process by measuring the flow of fluid in the pipeline.
In summary, vortex flowmeter is a kind of flow measuring instrument with high precision, wide range, good stability, strong adaptability and wide application. With the continuous development of industrial automation and technological progress, the application prospect of vortex flowmeter will be broader.
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