中国电机工程学报2024，Vol.44Issue(1)：341-352,中插28,13.DOI:10.13334/j.0258-8013.pcsee.222939
水分侵入高温硫化硅橡胶扩散行为的仿真研究(一):数值建模与计算
Numerical Simulation of Diffusion Behavior of Water Ingress Into HTV Silicone Rubber(Part Ⅰ):Numerical Modeling and Calculation
摘要
Abstract
Water ingress impacts the long-term reliability of silicone rubber composite insulators.With limitations of experiment methods and characterization techniques,however,it is difficult to detect the dynamic diffusion behavior of water ingress into silicone rubbers.Hence,we propose a numerical modeling method to visually simulate the diffusion behaviors of liquid water and water vapor permeating the high temperature vulcanized silicone rubbers,which have been studied in two-part article.This paper focuses on methods of the numerical modeling and calculating,using finite-difference time domain method and Newton-Raphson algorithm,based on the Langmuir diffusion model.It has been programmed by using MATLAB to simulate the dynamic diffusion behaviors of liquid water ingress into silicone rubbers,achieving the spatial distributions of moisture concentration of the specimen section along height and thickness varying with testing time.Two different water phases in mobile and bound states due to moisture absorption have been decoupled from the total moisture content in simulations,and thus their evolving patterns of spatial and temporal distributions can be calculated with the total moisture weight over time.The numerical modeling and calculations have been verified by data error analysis between simulations and experiments.The influences of temperature and the amount of the alumina hydroxide content on the distributions of moisture diffusion behaviors are also studied,whose features are clarified in the Langmuir diffusion curves.The proposed method offers a new thought to study the water diffusion behavior in the silicone rubbers.关键词
外绝缘/硅橡胶/水分/扩散行为/数值建模Key words
water outdoor insulation/silicone rubber/water content/diffusion behavior/numerical modeling分类
信息技术与安全科学引用本文复制引用
左周,周颖,梁曦东,罗兵,王婷婷,刘书棋,王乾,刘书明..水分侵入高温硫化硅橡胶扩散行为的仿真研究(一):数值建模与计算[J].中国电机工程学报,2024,44(1):341-352,中插28,13.基金项目
特高压电力技术与新型电工装备基础国家工程研究中心开放基金(20202002144).The National Engineering Research Center of UHV Technology and Novel Electrical Equipment Basis(20202002144). （20202002144）
