How the elbow flow meter works

Abstract: The information on the working principle of the elbow flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. Elbow tube flowmeters also belong to the category of differential pressure flowmeters. Elbow tube sensors use the inertial principle of fluid to generate differential pressure. When the fluid passes through the elbow, the fluid is forced to make a similar circular motion due to the restraint of the elbow, and the fluid is generated during the circular motion. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the working principle of the elbow flowmeter. The elbow flowmeter also belongs to the category of differential pressure flowmeter. The elbow sensor uses the inertia principle of the fluid to generate differential pressure. When the fluid passes through the elbow, due to the constraint of the elbow, the fluid is forced to make a similar circular motion, and the centrifugal force generated by the fluid during the circular motion acts on the inner and outer sides of the elbow, causing the inner and outer sides of the elbow sensor to generate A pressure difference, the size of the pressure difference (that is, the pressure difference value) is related to the density of the fluid, the average flow rate of the fluid, and the radius of curvature of the circular motion of the fluid. They follow the relevant laws of Newton's law of motion that all objects in circular motion must follow. The successful development of the elbow flowmeter has a solid theoretical and experimental research basis. In terms of theoretical research, the method of numerical solution of the differential equation of fluid flowing through the elbow is mainly used to fully reveal the flow law of the fluid flowing through the elbow. In terms of experimental research, there are not only a large number of experimental research in the laboratory, but also authoritative verification of the flow measurement of different media in the national flow verification station (Kaifeng water large flow, Yantai steam, Huayang natural gas). Home Type Appraisal (Kaifeng•The experimental study of water) shows that: due to the diversion effect of the elbow, the fluid flowing through the elbow presents a very complex flow state. By obtaining the numerical solution of the Navier-Stokes differential equation (N-S equation), it can be shown animatedly that this flow state mainly includes the main flow along the main pipe, the double helical secondary flow perpendicular to the main flow, and the outlet. The main content such as whirlpool has strong regularity. According to the proportional relationship between the real viscous fluid passing through the inner and outer pressure difference of the elbow, it has a good correlation. According to the principle of dimensional analysis, the average flow velocity through the elbow and the pressure difference between the inside and outside of the elbow can be given by the following formula: When the fluid flows through a pipeline under the condition of a certain temperature and a certain pressure, when it flows through the bend, The fluid will do a corresponding circular rotational motion. According to the fluid forced swirl theory, the circular motion of the fluid in the pipe is similar to the circular motion of the solid in the space state, so the fluid will inevitably generate an inertial centrifugal force, and the magnitude of the centrifugal force is related to the fluid velocity, the fluid density and the circular motion The radius of curvature (that is, the radius of curvature of the elbow sensor) and other factors are related. Since the radius of curvature of the elbow sensor is known, the density of the fluid flowing through the elbow sensor can be accurately obtained by the computer of the host computer by measuring the temperature, pressure and other parameters of the fluid. Therefore, the centrifugal force generated on the elbow sensor is only a 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 of the fluid can be calculated and determined by multiplying the flow rate by the cross-sectional area of ​​the pipeline and the density of the fluid. The calculation relationship is as follows: Formula ① gives the functional expression of the average flow velocity and differential pressure value of the fluid flowing through the elbow: V=a[(P1-P2)/ρ]β--------① Among them: V---the average flow velocity of fluid; a---comprehensive flow coefficient, a=f (bend ratio of elbow, Reynolds number, dynamic viscosity of medium, roughness of pipe, etc.) , especially the influence of the bend-diameter ratio is the most important: P1-P2-----the pressure difference between the inside and outside of the elbow;ρ---- the density of the fluid;β---- Index; After calculating the average flow velocity V, the functional expression for calculating the flow rate can be obtained: Q=S*V*ρ-------------② In the formula: S----the cross-sectional area of ​​the elbow; V---the average flow velocity of the fluid; Scope of application 1. Nominal diameter: 25mm≤DN≤2000mm 2. Nominal pressure: PN≤10MPa 3. Medium temperature: t≤450℃(t>450℃ notice when ordering) 4. Reynolds number range: ReD>104 5. Accuracy class: 1, 1.5 6. R/D≥1.25 The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The working principle of elbow flow meter'

This is an global standard which acts as a form of promise that Beijing Sincerity Automatic Equipment Co., Ltd manufatures according to the finest quality standards.

You can find a large selection of quality at Sincerity Flow Meter. Go get your desired one.

Beijing Sincerity Automatic Equipment Co., Ltd knew if this worked for us, it would work for others, so we took the exclusive product and program and re-developed it to be more accessible to customers.

The major classifications of are v shape coriolis mass flow meter, vortex flow meter manufacturer, low flow turbine flow meter and u shape coriolis mass flow meter machines.