Rotor flowmeter flow formula | Rotor flowmeter gas flow correction formula

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1. The larger the KF coefficient of the GD rotor flowmeter, the higher the flow rate? In the GD rotor flow meter, the larger the KF coefficient (instrument coefficient), the smaller the measured flow value under the same number of pulses. The principle behind this is derived from its basic measurement formula: flow rate=number of pulses/KF coefficient. This formula is the key to understanding the relationship between the two. From the formula, it is clear that the flow rate is inversely proportional to the KF coefficient. When the number of pulses generated by the flowmeter remains constant, the larger the value of the KF coefficient, the smaller the calculated flow rate.
2. For example, suppose the flowmeter generates 1000 pulses at a certain moment: - If its KF coefficient is 10, then the calculated flow rate is 1000/10=100 (flow unit). -If its KF coefficient is 20, then the calculated flow rate becomes 1000/20=50 (flow unit). This example intuitively demonstrates that when the pulse signal is the same, the instrument coefficient doubles, and the final displayed flow value will be halved.

2. Conversion of liquids with different specific gravities using a float flowmeter

Flow correction formula for a rotor flowmeter ignoring the influence of medium viscosity: For liquids, Q2=Q1 {[(γ f - γ 2) γ 1]/[(γ f - γ 1) γ 2]} ^ (1/2). For gases, Q2=Q1 {[(P1 · T2 · K2)/(P2 · T1 · K1)] ^ (1/2)} · [(γ 1/γ 2) ^ (1/2)]. In the formula: Q2s actual volumetric flow rate during operation; Volume flow rate at Q1 scale; Heavy weight of γ f float; Medium density at the γ 1 scale; The density of the medium during actual operation of γ 2; The absolute pressure at P1 scale, the absolute pressure at P2 scale, the absolute

temperature at T1 scale, the absolute temperature at T2 scale, the absolute temperature at K1 scale, the compression coefficient at K2 scale, and the compression coefficient at K2 scale. The working principle formula of the rotor flowmeter is based on the force balance relationship in fluid mechanics. 1. Working principle: When the fluid flows through the conical tube from bottom to top, it is intercepted by the rotor, creating a pressure difference between the upstream and downstream of the rotor. This pressure difference acts on the rotor, creating a force that causes it to move upwards. When this force is greater than the gravity of the rotor immersed in the fluid, the rotor rises. As the rotor rises, the annular gap area between the rotor and the cone tube increases, and the pressure difference of the fluid acting on the rotor decreases. When the pressure difference is balanced with the rotors gravity (minus buoyancy), the rotor stops at a certain position. When the flow rate changes, the rotor will reach a new equilibrium at the corresponding position

2. Core formula Balance formula: $V_f (\ rhouf - \ rho) g=A_f \ Delta p $Where: - $V_f $is the volume of the rotor - $\ rhouf $is the density of the rotor material - $\ rho $is the density of the measured fluid - $g $is the gravitational acceleration - $A_f $is the cross-sectional area of the largest part of the rotor - $\ Delta p $is the pressure difference before and after the rotor Flow formula: $q-v=\ frac {C_A A_R} {\ sqrt {1- \ beta ^ 4}} \ sqrt {\ frac {2 \ Delta p} {\ rho} $Where: - $q-v $is the volumetric flow rate - $C_A $is the flow coefficient - $A_R $is the annular gap area between the rotor and the cone tube - $\ beta $is the ratio of the maximum d

Rotor flowmeter flow formula | Rotor flowmeter gas flow correction formula

2. Conversion of liquids with different specific gravities using a float flowmeter

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