Principle of vortex flow meter

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Principle of vortex flow meter The vortex flow meter, also known as the Karman vortex flow meter or vortex-type flow meter, is a flow measurement instrument manufactured based on the Karman vortex principle. A generator is installed inside the measuring tube of the instrument; when the medium flows past this generator, vortices are formed behind it. The frequency f of these vortices is proportional to the flow velocity v of the medium, and by detecting this frequency, it is possible to measure the flow velocity. The schematic diagram of the vortex flow meter is shown in Figure 1. http://www.china-suke.com/news-images/news-1026-1.jpg The calculation formula for the vortex flow meter is as follows: f=st*v/d (f: frequency in Hz) ； st: Strouhal number, dimensionless ； v: flow velocity, unit m/s ； d: width of the vortex generator, in meters; St is the Strouhal number, which is a function of the Reynolds number. When the Reynolds number Re>2*104