Vortex flowmeter and vortex street | Doppler flow velocity flowmeter

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1. What is the difference between vortex flowmeter and vortex swirl flowmeter? There are significant differences in the design principles and application fields between vortex flowmeter and vortex swirl flowmeter. The vortex flowmeter is based on the Karman vortex principle and is a flow measurement device with no moving parts. It is suitable for monitoring the flow of various fluids in industrial pipelines, including but not limited to gases, liquids, and vapors. The characteristics of this flowmeter are low pressure loss, wide range, and high accuracy. Moreover, its performance is almost unaffected by parameters such as fluid density, pressure, temperature, and viscosity when measuring volumetric flow under attitude disturbance conditions. The vortex swirl flowmeter adopts microprocessing technology, which has powerful functions, wide flow range, simple operation and maintenance, and convenient installation process. Its main technical indicators have reached the advanced level of similar international products, and are widely used in gas metering in industries such as petroleum, chemical, power, metallurgy, and coal.

2. The difference between vortex flowmeter and vortex flowmeter

The difference between vortex flowmeter and vortex flowmeter mainly lies in their working principles.

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1. Working principle of vortex flowmeter: The vortex flowmeter is based on the Kalman vortex principle.

. When a fluid passes through a narrow slit or obstacle, it forms vortices on both sides of the object. The development and dissipation process of these eddies is periodic, and their frequency is directly related to the flow velocity of the fluid. By detecting the frequency of these vortices, the flow veloci
Vortex flowmeter and vortex street
ty can be calculated, thereby obtaining the flow rate value. This phenomenon is called vortex street, where vortices form an ordered arrangement in the fluid, similar to buildings on both sides of a street.

2. Working principle of vortex flowmeter: The vortex flowmeter adopts the principle of spiral inlet vortex.

. Install a vertical twisted blade in the pipeline, which will rotate and form a vortex when the fluid passes through. These vortices form near the centerline of the pipeline, and the center of the vortices rotates around the centerline while expanding the rotation radius as the fluid moves forward, forming a spiral motion similar to a conical spiral. For the observation point on the wall of the residual pin behind the vortex generator, the velocity of the fluid will periodically change, and its frequency is proportional to the flow velocity of the fluid. By detecting this frequency, the flow velocity can be determined and the flow rate value can be further calculated.

3. Doppler flowmeter

4. What is the difference between turbine and vortex gas flowmeter?

The difference between vortex flowmeter and vortex flowmeter. Vortex flowmeter is a device that sets a stagnation piece in the flowmeter pipeline. When the fluid flows through the stagnation piece, two asymmetric vortices will be generated downstream due to the stagnation effect on the surface of the stagnation piece. These vortices will separate on the side and rear of the stagnation piece, forming a so-called Karman vortex column. The rotation direction of the two vortices is opposite. Karman theoretically proved that when h/l=0.281 (h is the width between two vortex columns, and l is the distance between two adjacent vortic

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