Vortex steam flowmeter usually consists of vortex flow sensor and signal processing unit. The vortex flow sensor is responsible for measuring the frequency of vortex street, and the signal processing unit processes the signal output by the sensor to calculate the steam flow.
In the vortex flow sensor, there is an obstacle called vortex generator, which can be a triangular column or a blade. When steam flows through the vortex generator, vortices will be generated, and the frequency of these vortices is proportional to the steam flow. The sensor will detect the frequency of these eddy currents and transmit the signal to the signal processing unit.
After receiving the signal from the sensor, the signal processing unit will amplify, filter and shape it to extract the frequency of eddy current. Then, according to the known proportional relationship between vortex frequency and steam speed, the steam speed is calculated. Finally, according to the flow velocity and the cross-sectional area of the pipeline, the flow rate of steam is calculated.
In a word, the vortex street steam flowmeter calculates the speed and flow of steam by measuring the vortex frequency generated when steam flows through obstacles.