Three-dimensional multi-field coupling simulation method for flow characteristics of multiple metal particles in GIS equipment
A simulation method and technology of flow characteristics, applied in the direction of design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve the problem of difficult discrete particle flow details, complex computational calculations, and insufficient theoretical derivation of force analysis of charged particles. Improvement and other issues
A simulation method and technology of flow characteristics, applied in the direction of design optimization/simulation, instrumentation, electrical digital data processing, etc., can solve the problem of difficult discrete particle flow details, complex computational calculations, and insufficient theoretical derivation of force analysis of charged particles. Improvement and other issues
CN112749503AActive Publication Date: 2021-05-04ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +2
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[0062] The present invention will be further described below in conjunction with accompanying drawing:
[0063] Such as figure 1 The method for the three-dimensional multi-field coupling simulation of the multi-metal particle flow characteristics inside the GIS equipment shown, the method includes the following steps:
[0064] Step 1: Based on the spherical Lagrangian particle-based mathematical model unit, set the density ρ of each particle in the Lagrangian particle that constitutes each metal particle ii , radius r ii , Young's modulus Y ii , Poisson's ratio B ii , to construct the required particle model, where the subscript ii represents the sequence number of the i-th Lagrangian particle that constitutes the i-th particle, and for spherical particles, ρ i = ρ ii , r i = r ii , Y i =Y ii , B i =B ii , ρ i is the density of the i-th particle, r i is the i-th particle radius, Y i is the Young's modulus of the i-th particle, B i is the Poisson's ratio of the i...
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The invention belongs to the field of insulation design and numerical simulation of high-voltage switch equipment, and particularly relates to a three-dimensional multi-field coupling simulation method for flow characteristics of multiple metal particles in GIS equipment. An Euler-Lagrange model and geometric modeling of particle flow under a coaxial cylindrical structure electric field are completed by writing open source codes of a CFDEM, and meanwhile numerical coupling of FVM and DEM algorithms is achieved. Calculation is completed on the basis of comprehensively considering a series of interactions of collision between particles, between particles and fluid, between particles and an electric field and between particles and an electrode and a shell and physical processes of charge and charge transfer when the particles collide with the electrode or between the particles, and characteristic parameters of particle flow characteristicssuch as the electric quantity, the speed, the displacement and the received acting force, are obtained. the dynamic distribution of multiple particles under two voltages of direct current and alternating current and the rolling state of the linear particles are finally observed through the post-treatment of the combination of the number and the shape, .
Description
technical field [0001] The invention relates to the technical field of insulation design and numerical simulation of high-voltage switchgear, in particular to a three-dimensional multi-field coupling simulation method for the flow characteristics of multi-metal particles inside GIS equipment. Background technique [0002] The movement of charged particles is generally considered to be one of the dangerous behaviors that threaten the insulation of gas-insulated switchgear (GIS) equipment. However, there are very few studies on the simulation or numerical calculation of particle motion behavior, and the theoretical derivation of the force analysis of charged particles is not perfect. The main reasons are the following three aspects: First, the physical modeling of particle motion is complex , the shape of the particle itself, the material properties, the external environment and other natural factors vary widely. Various random collision behaviors occur during the particle mot...
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Patent Timeline
04 May 2021
Publication
CN112749503A
- IPC
- G06F30/25; G06F119/14
- CPC
- G06F30/25; G06F2119/14
- Inventors
- 杨为; 朱太云