On the principle and application of elbow flow meter what?

The fluid flows through a pipe at a pressure of a certain temperature, and when it passes through the turn, the fluid will do the corresponding circumferential rotation motion. According to the theory of fluid fluid forced rotating, circular motion in the pipeline and solid state space under similar in circular motion, so that the fluid will produce centrifugal force, the centrifugal force of fluid velocity, the size and the density of the fluid and the circular motion of the radius of curvature (i.e. the radius of curvature of the bend flow meter sensor) etc. about.

The curvature radius of elbow flowmeter sensor is known, the density of the fluid through the bend sensor and the fluid parameters such as temperature and pressure were measured accurately by using the host computer, so the centrifugal force generated in the elbow sensor size is the only function of fluid velocity. As long as the centrifugal force is measured, the flow rate of the fluid in the pipeline can be measured, and the flow rate is multiplied by the cross-sectional area of the pipe and the density of the fluid. Its calculation relation is as follows:

The expressions of the mean velocity and the differential pressure of the fluid flowing through the pipe are given.

V=a[(P1-P2) /ρ]β 1.

The mean velocity of V--- fluid;

A--- integrated flow coefficient, a=f (bend diameter ratio, Reynolds number, medium dynamic viscosity, pipe roughness, etc.), especially the influence of the bending diameter ratio is the most important:

Pressure difference between inner and outer side of P1-P2----- bend pipe;

- density of fluid;

- index;

Calculation of the average flow rate of V, you can get the function expression of the calculation of the flow:

Q=S*V*&rho - 2;

Form in:

S---- elbow cross section area;

Mean velocity of V--- fluid;

Applicable scope of elbow flow meter

1, elbow flow meter nominal diameter: 25mm≤ DN≤ 2000mm

2, nominal pressure: 10MPa; PN&le

3, medium temperature: t≤ 450 degrees C (t450 c c c c c c c c c c c c c c)

4, elbow flow meter Reynolds number range: ReD104

5, accuracy level: 1, 1.5

6, elbow flow meter R/D≥ 1.25