考虑热进口段时管内对流换热的熵产分析  

Entropy Generation Analysis of Convective Heat Transfer through a Duct Including Thermal Entrance Region

作　　者：邵理堂[1] 孟春站[1] 唐小村[1] 

机构地区：[1]淮海工学院基础科学系,连云港222005

出　　处：《天津师范大学学报（自然科学版）》2001年第4期44-47,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：淮海工学院自然科学基金资助课题

摘　　要：利用热力学原理 ,在考虑热进口段时 ,分别就壁面热流恒定和壁面温度恒定两种情况 ,对管内对流换热进行了熵产分析 .引入了熵产强度的概念 ,给出了对热进口段和充分发展段都适用的熵产强度计算式 ,讨论了由流阻引起的熵产强度和由温差引起的熵产强度及有关参数对总熵产强度的影响 。Based on the principle of thermodynamics,entropy generation analysis of convective heat transfer through a duct including thermal entrance region is made on the condition of constant wall heat flux and constant wall temperature respectively. The concept of entropy generation intensity is introduced,the calculating formula which is applicable to thermal entrance region and full development of region is given. The entropy generation intensity due to flow resistance, the entropy generation intensity due to difference in temperature and the influence of concerning parameter on the total entropy generation intensity are analysed. The conclusions provide basis for the optimal design of heat exchangers.

关 键 词：热进口段 对流换热 熵产强度 热换器 热力学 优化设计 

分 类 号：TK172[动力工程及工程热物理—热能工程] TK124