Research on Magnetic Field Simulation of Electromagnetic Flow Meter

Abstract: The research information of electromagnetic flow meter magnetic field simulation is provided by the excellent flow meter and flow meter production and quotation manufacturers. In recent years, the internal magnetic field division of electromagnetic flowmeters has attracted much attention of researchers. In this paper, ansys finite element software is used to model and simulate the magnetic field sensitive field inside the electromagnetic flowmeter, and under this model, the increase in the electromagnetic flowmeter is studied. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the magnetic field simulation research articles of electromagnetic flowmeters. In recent years, the internal magnetic field division of electromagnetic flowmeters has attracted much attention of researchers. In this paper, ansys finite element software is used to model and simulate the magnetic field sensitive field inside the electromagnetic flowmeter, and under this model, the electromagnetic flowmeter is studied when some granular substances with different magnetic permeability are added to the electromagnetic flowmeter. Internal magnetic field distribution. 1 Flowmeter Structure and Magnetic Field Distribution Simulation Collector-type electromagnetic flowmeter is widely used in oil downhole measurement. It is embedded with two emitting magnetic poles and two receiving electrodes in the flowmeter casing. Because the umbrella-type current collector is installed at the bottom of the electromagnetic sensor, when the flowmeter is located at the designated measuring point, the current collector is opened to block the fluid flow channel between the casing and the logging tool, forcing all or absolutely the fluid. Most of it flows through the measurement area of ​​the electromagnetic sensor and flows back to the wellbore through the upper outlet. The cross-sectional structure of the downhole collector flowmeter is shown in Figure 1(a). Fig. 1 Schematic diagram of the structure of electromagnetic flowmeter The ANSYS simulation model of the collector-type electromagnetic flowmeter is shown in Fig. 1(b). In the figure, the electromagnetic flowmeter has two magnetic poles in the horizontal direction and two poles in the vertical direction; the magnetic pole is composed of a magnetic core and a coil, that is, a layer of coil is wrapped around the outer side of the magnetic core of each magnetic pole to generate alternating current. changing magnetic field. During the simulation, the length and width of the magnetic pole core of the sensor is 8mm and the width is 4mm. Stainless steel. After the solenoid coil current is loaded, the outer side of the left magnetic pole is the S pole, and the inner side is the N pole; the outer side of the right magnetic pole is the N pole, and the inner side is the S pole. The magsolv command is used to statically solve the magnetic field distribution problem of the external flow electromagnetic flowmeter, and the magnetic induction intensity B distribution and the 2D magnetic flux line distribution are obtained, as shown in (a) and (b) in Figure 2, respectively. It can be seen that the magnetic field distribution in the sensor pipe is relatively uniform, and the magnetic field lines are dense in the area near the surface of the magnetic pole, indicating that the measurement sensitivity of this part is high. In order to more clearly understand the distribution of the magnetic induction field inside the flowmeter, the magnetic induction intensity distribution field in the measurement area of ​​the electromagnetic flowmeter is established, as shown in Figure 3. The magnetic induction intensity of each part can be clearly obtained from the simulated magnetic induction distribution diagram. 2 Simulation of the magnetic field distribution of the electromagnetic flowmeter when the pipeline contains magnetic substances In order to investigate the influence of the magnetic material contained in the fluid on the magnetic field distribution of the electromagnetic flowmeter, the ANSYS simulation model is shown in Figure 4. In the figure, a diameter magnetic sphere is set in the measurement area of ​​the sensor pipe, and the relative permeability of the magnetic sphere is set as:μ=10. Apply a load excitation current to the coil, use the esize command to mesh the ANSYS model, and use the magsolv command to statically solve the magnetic field distribution problem of the electromagnetic flowmeter when the magnetic material is contained, and obtain the magnetic induction intensity B distribution and 2D magnetic flux lines distribution, as shown in Figure 5 (a) and (b). It can be seen from Figure 5 that when the magnetic material flows through the measurement area of ​​the sensor pipeline, the magnetic field near the magnetic material changes, which in turn affects the overall distribution characteristics of the measured magnetic field. That is to say, the magnetic substances in the fluid will also affect the measurement of the collector type electromagnetic flowmeter. The distribution of the simulation results is numerically displayed as shown in Figure 6. It can be seen from the simulation results that when the fluid contains magnetic substances, the magnetic induction intensity of this part increases, which affects the distribution of the magnetic induction intensity in the entire space. 3 Conclusion The collector electromagnetic flowmeter has a wide range of applications in oil and gas well measurement with a special structure. This paper establishes a simulation model for the flowmeter with this special structure, and uses the finite element method to measure the magnetic field of the collector electromagnetic flowmeter. The computer experiment simulation is carried out for the determination of the electromagnetic flowmeter, which lays a certain foundation for the simulation measurement of the magnetic field and the structural optimization of the electromagnetic flowmeter in the simulation method of the electromagnetic flowmeter. The above is the whole content of this article. 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