中国电机工程学报2017，Vol.37Issue(10)：2927-2932,6.DOI:10.13334/j.0258-8013.pcsee.160524
基于有限单元法的污垢等效导热系数计算
Numerical Calculation on Effective Thermal Conductivity of Fouling Based on the Finite Element Method
摘要
Abstract
Micro-scale random pore spatial structure of heat exchange surface fouling was simulated by using the finite element method,and then material parameters and cell properties were assigned by APDL parametric language of ANSYS.Based on the energy conservation law and the Fourier heat transfer law of porous media,a method for calculating the equivalent thermal conductivity,of heat transfer surface was proposed.The coupled heat conduction of fouling was studied by the application of steady-state plate method,and it is proved that the effective thermal conductivity of fouling micro model is feasible by the method of steady-state plate.Furthermore,the influence of micro-scale pore on the effective thermal conductivity of fouling was analyzed under various conditions of porosity and pore size.The results showed that the effective thermal conductivity of fouling linear decreases with the increase of the porosity,and linear increases with the increase of the pore size.The analysis method brings convenience for design and cleaning of heat exchangers,at the same time,it opens up a new way for the further study of heat surface fouling in complex heat transfer process,make the calculation results are more accordant with practical circumstances.关键词
污垢/多孔介质/等效导热系数/稳态平板法/有限元Key words
fouling/porous media/effective thermal conductivity/method of steady-state plate/finite element分类
能源科技引用本文复制引用
张仲彬,刘洋,张浩,徐志明..基于有限单元法的污垢等效导热系数计算[J].中国电机工程学报,2017,37(10):2927-2932,6.基金项目
国家自然科学基金资助项目(51476025)Project Supported by National Natural Science Foundation of China (51476025). （51476025）
