Flow variation in orifice plate flow meters
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If the density of the medium passing through the orifice flow meter increases, will its flow rate also show an increase? Thank you, plus points; I don’t quite understand
The flow rate ratio is equal to the square root of the density ratio; as the density increases, the flow rate increases as well
From the formula used in orifice plate flow meters to calculate flow rate, if the density of the medium increases, the gas flow rate will appear lower
It becomes clear by looking directly at the gas equation of state for flow
M=1/4 ad^2 √ρΔp. From this formula, it can be seen that the mass flow rate is proportional to the density ρ; therefore, when the density increases while all other conditions remain constant, including the pressure difference Δp, the mass flow rate also increases
Does the pressure difference change as density increases? ? ?
In the basic formula for differential pressure flow meters, the flow rate is proportional to the square of density; therefore, as density increases, the flow rate also increases, though the rate of change isn’t extremely large. For a more detailed understanding, one can look at the calculation formulas.
No, a orifice plate flow meter measures volumetric flow rate; it is only related to the pressure difference before and after the orifice plate, and has nothing to do with the density of the fluid.
The orifice plate is a differential pressure flow meter, and this value is related to the square root of the differential pressure
According to the calibration specifications provided by the flow meter, the indicated flow rate is lower due to the density factor.