张永存

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:力学与航空航天学院

学科:工程力学. 计算力学. 航空航天力学与工程

办公地点:系楼504

联系方式:yczhang@dlut.edu.cn

电子邮箱:yczhang@dlut.edu.cn

扫描关注

论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

A fast numerical method for the analysis of the heat transfer performance of graded metallic honeycomb materials

点击次数:

论文类型:期刊论文

发表时间:2014-12-01

发表刊物:INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

收录刊物:SCIE、EI

卷号:79

页面范围:507-517

ISSN号:0017-9310

关键字:Graded metallic honeycomb; Heat transfer; Two-dimensional lattice; Finite element analysis and finite difference method

摘要:A fast numerical method that combines the finite element and finite difference methods (FE-FDM) is proposed to analyze the forced convection heat transfer performance of graded honeycomb heat exchangers. The temperature distribution in the cross-section of the graded honeycomb perpendicular to the direction of flow is described using discrete finite elements that include the convective heat transfer of the two side surfaces. The temperature distribution in the flow direction is obtained by the finite different method. The most important difference with previous methods is the assumption of Constant Cross-sectional Fluid Temperature (CCFT) is relaxed. The fluid temperature of every individual channel is assumed constant and the different channels may have different temperatures in the same cross-section. Comparison with the results by the CFD model shows that FE-FDM has high precision and efficiency. The results of examples illustrate that its precision is similar to CFD model, but its calculation efficiency is increased 10(2)-10(4) times as compared to CFD simulation. The assumption of CCFT is only suitable for heat transfer analysis of uniform honeycombs. (C) 2014 Elsevier Ltd. All rights reserved.