scholarly journals Influence of magnetic field and working voltage on the tripping performance in spherical cylindrical ECP

2021 ◽  
Vol 261 ◽  
pp. 02033
Author(s):  
Jianping Zhang ◽  
Baodong Ren
Keyword(s):  
Magnetic Field ◽  
Magnetic Induction ◽  
Optimization Design ◽  
Fine Particles ◽  
Magnetic Confinement ◽  
Operating Conditions ◽  
Dust Removal ◽  
Trapping Effect ◽  
Trapping Performance ◽  
Magnetic Induction Intensity

In order to further improve the trapping effect of fine particles, a new electrostatic cyclone precipitator (ECP) with magnetic confinement was proposed, the overall efficiencies of fine particles under different operating conditions were numerically simulated, and the influence of working voltage on the dust-removal effect of fine particles with and without magnetic field were discussed. The results show that increasing working voltage or magnetic induction intensity improves the trapping performance of spherical cylindrical magnetically confinement ECP, and the lifting effect gradually weakens while increasing the same amplitude. The results can offer technical reference for the optimization design of greatly improving the ECP dust-removal performance.

Microstructure and Properties of Cu-17Fe Alloy Aged Treatment in High Magnetic Field

2011 ◽  
Vol 194-196 ◽  
pp. 1270-1274
Author(s):  
Ke Ming Liu ◽  
De Ping Lu ◽  
Hai Tao Zhou ◽  
Sheng Fa Wen ◽  
Shi Yong Wei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Magnetic Induction ◽  
Solid Solubility ◽  
Aging Treatment ◽  
Heat Treating ◽  
Hardness Tester ◽  
Energy Spectrometer ◽  
Magnetic Induction Intensity ◽  
Scanning Electron

Aging treatment of Cu-17Fe alloy was investigated by a vacuum heat treating furnace in high magnetic furnace. The microstructures were documented using scanning electron microscopy (SEM). The solid solubility of Fe in Cu matrix was analysed by energy spectrometer (EDS). The mechanical properties were measured with a Vickers hardness tester. The electrical conductivity was measured with a micro-ohmmeter. The results showed that high magnetic field can promote spheroidization of the Fe dendrites, the spheroidization intensifies and the solid solubility decreases with the increasing magnetic induction intensity of the high magnetic field exerted to the alloy, the solid solubility of Fe is minimum when the magnetic induction intensity is 10T at 500°C during precipitation. And Cu-17Fe alloy has a good strength/conductivity combination of 110Hv/63%IACS after aging treatment of 10T at 500°C for 1h.

Simulation Research on the Magnetic Field of the Positioning Permanent Magnet for MEMS inside Human Body Based on Ansoft

2014 ◽  
Vol 596 ◽  
pp. 67-71
Author(s):  
Xiu Quan Liu ◽  
Yan Hong Li
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Dipole ◽  
Human Body ◽  
Magnetic Induction ◽  
Dipole Model ◽  
Magnetization Direction ◽  
Simulation Research ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

the magnetic dipole model of the cylindrical permanent magnet was introduced. Then, based on Ansoft software, the simulation model of the cylindrical permanent magnet was established, and the influence of some parameters, such as the height, radius and magnetization direction on the magnetic induction intensity ,were studied; at the same time, under these two models the calculation was compared, the result shows the the magnetic dipole model is applied on condition that distance is nine times greater than the cylindrical permanent magnet size.

Electromagnetic Nondestructive Testing Model and Surface Magnetic Field Analysis for Circumferential Cracks on Metal Rod

2019 ◽  
Vol 2 (4) ◽  
Author(s):  
Feng Jiang ◽  
Shulin Liu ◽  
Shaojie Xin ◽  
Hongli Zhang
Keyword(s):  
Magnetic Field ◽  
Analytical Model ◽  
Magnetic Induction ◽  
Crack Depth ◽  
Field Analysis ◽  
Surface Magnetic Field ◽  
Circumferential Crack ◽  
Inner Surface ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

Abstract In this paper, an analytical model for a metal rod with a coating layer is proposed to evaluate circumferential crack from the signals of the surface magnetic field. In the proposed model, magnetic vector equations for four regions of space were built, and series expressions of the magnetic field were proposed by the truncated region eigenfunction method. The calculation results can show the three-dimensional distribution of axial and radial magnetic induction intensities on the surface of a metal rod clearly. In addition, the analytical model is verified by using comsol finite element simulation, which also demonstrates that induced eddy currents on the inner surface of the metal rod with cracks appear to be propelled toward the inner layer of the metal rod and the presence of a circumferential crack directly causes a decrease in the induced eddy current on the inner surface of the rod. The results calculated from the analytical model indicated that the model is capable of providing an accurate variation in the magnetic field due to circumferential cracks at different depths. The analytical results showed that the radial magnetic induction intensity increases by 0.16 × 10−3 T, while the axial magnetic induction intensity decreases by 0.3 × 10−3 T as the crack depth increases from 0 to 3 mm.

The Effects of Static Magnetic Field in Leaching Cadmium and Arsenic by Acidthiobacillus ferrooxidans

2014 ◽  
Vol 675-677 ◽  
pp. 90-93
Author(s):  
Li Li Lu ◽  
Dong Wei Li ◽  
Xiang Dong Wei ◽  
Chan Juan Liao ◽  
Jiao Lian Jiang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Magnetic Induction ◽  
Mining Area ◽  
Low Energy ◽  
Leaching Rate ◽  
Environmental Friendly ◽  
Metal Recycling ◽  
Low Energy Consumption ◽  
Magnetic Induction Intensity

In view of the pollution of heavy metals in tailings of mining area, considering some metal recycling, in this paper, the method which was environmental friendly, mild reaction, short process, low energy consumption was applied to leaching As and Cd in tailings. Before leaching, Static Magnetic Field was used to deal with leach liquor, to research the effect of leaching rate for As and Cd. The results showed that under the conditions of pulp density 5%, inoculum 10%, leaching temperature 30°C, pH 2.0, magnetic induction intensity separately were 2mT , 5mT , 8mT and 11mT, the leaching rates of As and Cd were increased respectively about 8% and 2%. Besides, magnetic induction intensity also effected. The best magnetic induction intensity in bioleaching of As and Cd were respectively 2mT and 8mT.

scholarly journals A Theoretical Model of Residual Magnetic Field around a Pre-Magnetized Casing String

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4226
Author(s):  
Yucai Shi ◽  
Dongyue Jia ◽  
Zhichuan Guan ◽  
Yuqiang Xu ◽  
Weixing Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Induction ◽  
Current Model ◽  
Superposition Principle ◽  
Potential Method ◽  
Detection Distance ◽  
Magnetic Field Model ◽  
The Individual ◽  
Magnetic Poles ◽  
Magnetic Induction Intensity

In the field of petroleum drilling engineering, passive magnetic ranging technology is generally used for specialized drilling operations such as connecting relief wells, preventing wellbore collisions, guiding parallel horizontal wells, etc. Although pre-magnetized casing strings have been used to improve the detection distance and accuracy, the theoretical mechanism is not well understood. Based on the equivalent current model of a permanent magnet, a theoretical magnetic field model around the pre-magnetized casing string was established by using the vector potential method and vector superposition principle and validated by the COMSOL Multiphysics software. Our results show that connecting pre-magnetized individual casings with homogeneous magnetic poles can enlarge the magnetic induction intensity around the total casing string. Furthermore, the magnitude close to the casing coupling is significantly larger than that close to the middle of the individual casing. Connecting pre-magnetized individual casings with heterogeneous magnetic poles results in a low magnetic induction intensity around the total casing string. In order to improve the detection distance and accuracy of the magnetic ranging, the pre-magnetized individual casings should be connected with homogeneous magnetic poles. The results of this study can provide guidelines for the development of passive magnetic ranging technology.

The Magnetic Field Analysis of Dual-Coil Self-Sensing Actuator

2011 ◽  
Vol 181-182 ◽  
pp. 183-188 ◽  
Author(s):  
Cheng Wu Lin ◽  
Fang Dong ◽  
Hao Zheng ◽  
Hua Yan
Keyword(s):  
Magnetic Field ◽  
Magnetic Induction ◽  
Reference Value ◽  
Element Model ◽  
Field Analysis ◽  
Magnetic Field Analysis ◽  
Intensity Changes ◽  
Working Principle ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

This paper introduced working principle of dual-coil self-sensing actuator based on magnetically controlled shape memory alloy (MSMA). The ANSYS software was used to establish the finite element model of MSMA dual-coil self-sensing actuator. Edge element method was adopted to analyze the MSMA dual-coil self-sensing actuator's 3-D static magnetic field under the influence of different excitation voltages. The analysis obtained MSMA and silicon steel sheet distribution of magnetic induction intensity and the magnetic field intensity, has further confirmed the reliability of MSMA dual-coil self-sensing actuator, and has given the MSMA length relations along with the magnetic induction intensity changes. The results show that magnetic field analysis has certain reference value to the MSMA practical application.

scholarly journals Magnetoelastic Principal Parametric Resonance of a Rotating Electroconductive Circular Plate

2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Zhe Li ◽  
Yu-da Hu ◽  
Jing Li
Keyword(s):  
Magnetic Field ◽  
Circular Plate ◽  
Parametric Resonance ◽  
Magnetic Induction ◽  
Multiple Scales ◽  
Resonance Amplitude ◽  
Thin Circular Plate ◽  
Detuning Parameter ◽  
Principal Parametric Resonance ◽  
Magnetic Induction Intensity

Nonlinear principal parametric resonance and stability are investigated for rotating circular plate subjected to parametric excitation resulting from the time-varying speed in the magnetic field. According to the conductive rotating thin circular plate in magnetic field, the magnetoelastic parametric vibration equations of a conductive rotating thin circular plate are deduced by the use of Hamilton principle with the expressions of kinetic energy and strain energy. The axisymmetric parameter vibration differential equation of the variable-velocity rotating circular plate is obtained through the application of Galerkin integral method. Then, the method of multiple scales is applied to derive the nonlinear principal parametric resonance amplitude-frequency equation. The stability and the critical condition of stability of the plate are discussed. The influences of detuning parameter, rotation rate, and magnetic induction intensity are investigated on the principal parametric resonance behavior. The result shows that stable and unstable solutions exist when detuning parameter is negative, and the resonance amplitude can be weakened by changing the magnetic induction intensity.

scholarly journals Analysis of the Influence of Ferromagnetic Material on the Output Characteristics of Halbach Array Energy-Harvesting Structure

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1541
Author(s):  
Xiangyong Zhang ◽  
Haipeng Liu ◽  
Yunli He ◽  
Tingrui Peng ◽  
Bin Su ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Harvesting ◽  
Magnetic Induction ◽  
Ferromagnetic Material ◽  
Magnetic Medium ◽  
Halbach Array ◽  
Harvesting Efficiency ◽  
Energy Harvesting Efficiency ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

Due to the particular arrangement of permanent magnets, a Halbach array has an significant effect of magnetism and magnetic self-shielding. It can stretch the magnetic lines on one side of the magnetic field to obtain an ideal sinusoidal unilateral magnetic field. It has a wide application range in the field of energy harvesting. In practical applications, magnetic induction intensity of each point in magnetic field is not only related to the induced current and conductor but also related to the permeability of the medium (also known as a magnetic medium) in the magnetic field. Permeability is the physical quantity that represents the magnetism of the magnetic medium, which indicates the resistance of magnetic flux or the ability of magnetic lines to be connected in the magnetic field after coil flows through current in space or in the core space. When the permeability is much greater than one, it is a ferromagnetic material. Adding a ferromagnetic material in a magnetic field can increase the magnetic induction intensity B. Iron sheet is a good magnetic material, and it is easy to magnetize to generate an additional magnetic field to strengthen the original magnetic field, and it is easy to obtain at low cost. In this paper, in order to explore the influence of ferromagnetic material on the magnetic field and energy harvesting efficiency of the Halbach array energy harvesting structure, iron sheets are installed on the periphery of the Halbach array rotor. Iron sheet has excellent magnetic permeability. Through simulation, angle between iron sheet and Halbach array, radian size of iron sheet itself and distance between iron sheet and Halbach array can all have different effects on the magnetic field of the Halbach array. It shows that adding iron sheets as a magnetic medium could indeed change the magnetic field distribution of the Halbach array and increase energy harvesting efficiency. In this paper, a Halbach array can be used to provide electrical power for passive wireless low-power devices.

Polarization and bandgap characteristics of monolayer black phosphoene in magnetic field

2020 ◽  
Vol 34 (28) ◽  
pp. 2050314
Author(s):  
Cuilan Zhao ◽  
Jiali Liu
Keyword(s):  
Magnetic Field ◽  
Ground State Energy ◽  
Wave Vector ◽  
Ground State ◽  
Magnetic Induction ◽  
State Energy ◽  
Phonon Interaction ◽  
Interaction System ◽  
Black Phosphorene ◽  
Magnetic Induction Intensity

The effect of magnetic field on the polarization effect of black phosphorene is studied. The ground state energy and the relevant energy bandgap formula of carrier and carrier–phonon interaction system is derived in turn, and the effect of applied magnetic field on ground state energy and bandgap is also investigated, by the method of variational method, LLP unitary transformation method and linear combination operator method. When the substrate is given, the ground state energy and the relevant bandgap of the carrier–phonon interaction system changes with the magnetic induction intensity, phonon energy and cutoff wave vector. It can be shown by numerical calculation: The ground state energy and the relevant bandgap of the Hole and the Hole–phonon interaction system in black phosphorene increases with increase in magnetic induction intensity [Formula: see text]. The ground state energy of the Hole, Hole–phonon system and the relevant bandgap are different when the substrate is different. Under the action of a magnetic field, the ground state energy of the Hole and Hole–phonon system and bandgap decreases with increase in phonon energy and increases with increase in cutoff wave vector when the substrate is fixed.

Study on Intensified Bioleaching Technology by Static Magnetic Field of Chalcopyrite Tailings

2011 ◽  
Vol 84-85 ◽  
pp. 476-479
Author(s):  
Li Li Lu ◽  
Dong Wei Li ◽  
Lin Yu
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Magnetic Induction ◽  
Experimental Analysis ◽  
Thiobacillus Ferrooxidans ◽  
Leaching Rate ◽  
Atomic Fluorescence ◽  
Helmholtz Coils ◽  
Magnetic Induction Intensity ◽  
Fluorescence Spectrometer

Many different methods were found to increase the leaching rate by the researchers.In this paper,one of the methods--intensified leaching--was showed that the device for bioleaching was under the condition of static magnetic field.the device were designed according to Helmholtz coils,which can offered the static magnetic field,the leaching will start at the condition of the static magnetic field by the Thiobacillus ferrooxidans ( T. f ).the content of metals in samples were detected by Atomic fluorescence spectrometer after 25 days.Through the experimental analysis, the results showed that under the conditions of pulp density 5%,inoculum 10%,pH 2.0, magnetic induction intensity 3.14mT, the leaching rate of Cu and Fe in chalcopyrite mineral processing solid waste got improved. Especially the copper, the leaching rate raised from15.76% to 18.88%.

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