摘要
通过建立由壳体、管板和换热管等组成的换热器有限元分析模型,使用FLUENT生成的CDB文件和ANSYS本身的物理场进行耦合,把外部CBD边界条件映射到ANSYS模型上。先利用"分段建模,整体综合"技术,从实现换热器的工艺热分析的角度考虑,由FLUENT软件得到换热器整体温度场,输出得到了包含固体表面节点、单元和温度载荷等信息的CDB文件,然后利用温度场顺序耦合的思想,利用由FLUENT得到的结构温度场边界,在ANSYS软件中取节点文件并求解,创建结构热分析所需的结构温度场。比对CFD结果和有限元结果可知,两者温度场的分布没有差别,此耦合过程中没有出现失真现象,这为研究换热器的温差应力分析提供了可靠的依据。
A finite element analysis model of a heat exchanger was built,which is composed of shells,tubes,plates etc.The external boundary temperature field was mapped to ANSYS by coulping the CDB file from FLUENT with ANSYS multifield model.The whole temperature field of the heat exchanger was firstly simulated in FLUENT using a technique of ＂simulation in subsections,integration of the whole＂,to obtain the processing thermal analysis of the heat exchanger.A CDB file from FLUENT including information such as solid surface＇s nodes,elements and thermal loads etc.was output,then the sequence coupling was applied.After the nodal file was interpolated,the CDB file was read and solved to obtain the solid surface temperature field in ANSYS model.It was proved by contrast that there is no difference in temperature field setted by the present method with that of CFD.Therefore,in this coupling process,there was no precise loss between the datum from CFD and ANSYS,this feature provided a reliable basis for thermal-stress study of shell and tube heat exchanger.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第9期1615-1619,共5页
Chemical Industry and Engineering Progress
关键词
换热器
流固
传热
温度场
顺序耦合
heat exchanger
liquid-solid
heat transfer
temperature field
sequence coupling
