Steam flow meter measurement formula

Case introduction

Steam flowmeter is a measuring instrument that can safely guide actual production and brings a lot of help to life. After understanding the relevant measurement advantages of steam flow meters, it is necessary to further pay attention to its measurement principles so that they can be better used. Let’s learn about the calculation formula of steam flow meter here. The steam flowmeter uses the principle of fluid oscillation to measure flow. Its relationship can be expressed as: f=Stv/d. In the formula: f is the release frequency of the vortex, Hz; v is the average velocity of the fluid flowing through the vortex generator, m/s;d is the characteristic width of the vortex generator, m;St is the Stroha number, dimensionless, and its value range is 0.14-0.27. St is a function of Reynolds number, St=f(l/Re). When the Reynolds number Re is in the range of 102~105, the St value is about 0.2.

Therefore, during the measurement, it is necessary to try to satisfy the fluid's Reynolds number between 102~105 and the vortex frequency f=0.2v/d. To put it simply, during measurement, the fluid is allowed to pass through the pipeline and reach the vortex flow transmitter, and then two rows of vortices proportional to the flow rate are generated alternately up and down behind the vortex generator of the triangular prism. According to the release frequency of the vortex and the flow rate, Comparative data can be obtained by simple measurement through the average velocity of the fluid of the vortex generator and the characteristic width of the vortex generator.