Construction of vortex flowmeter | Working principle of vortex flowmeter?

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1. Working principle of vortex flowmeter

1. Placing a triangular vortex generator in the fluid will cause regular vortices to alternate on both sides of the vortex generator, which is called Karman vortex. These vortices are arranged in an asymmetric manner downstream of the vortex generator to form vortex columns.

2、 The vortex flowmeter measures the volumetric flow rate, standard state volumetric flow rate, or mass flow rate of gases, vapors, or liquids based on the K á rm á n Vortex Street principle, and can be integrated as a flow transmitter into automated positive osmosis control systems.

3、 Vortex flowmeter uses the principle of fluid oscillation to measure flow rate. When a fluid passes through a vortex flow transmitter, two alternating columns of vortices are generated behind the vortex generator, whose frequency is proportional to the average velocity of the fluid flowing through the vortex generator and the characteristic width of the vortex generator. The release frequency of a vortex can be expressed as: f=(v/d) * St, where f is the frequency (in Hz), v is the average velocity of the fluid (in m/s), d is the characteristic width of the vortex generator (in m), and St is the Strouhal number, which is usually a dimensionless value between 0.14 and 0.27.

4、 The Strouhal number St is a function of the Reynolds number Re, and within a specific range of Reynolds numbers, the value of St is approximately 0.2. In practical measurements, it should be ensured that the Reynolds number of the fluid is within this range, and the vortex frequency is proportional to the fluid velocity.

5、 By measuring the vortex frequency, the average velocity v of the fluid flowing through the

2. Introduction to Vortex Flow Meter

Vortex flow meter is researched and produced based on the Karman vortex principle, mainly used for flow measurement of industrial pipeline media fluids, such as gas, liquid, vapor and other media.

1. Working Principle: A vortex flowmeter is a type of flowmeter designed and manufactured using the Karman vortex principle and contemporary electronic technology. The frequency of vortex generation is proportional to the velocity of the fluid, and under certain conditions, it satisfies the following equation: f=St * v/d (where f: vortex generation frequency v: flow velocity d: triangular column width St: Strouhal number). The fluid vortex generates alternating pressure on the triangular column, which is detected by a piezoelectric signal sensor as an electrical signal and amplified by a preamplifier to become a standard electrical signal output.

2. Characteristics

1. The structure is simple and sturdy, with no movable parts, high reliability, and very reliable for long-term operation.

2. Easy installation and convenient maintenance.

3. The detection sensor does not directly contact the measu

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