中南大学学报（自然科学版）2016，Vol.47Issue(5)：1805-1811,7.DOI:10.11817/j.issn.1672-7207.2016.05.047
高速列车设备舱底板的辐射传热特性
Radiant heat transfer of high speed train equipment cabin bottom plate
摘要
Abstract
Numerical model was builtto analysethe effect of different wind velocities,initial temperature of bottom plat and radiant heat absorption rate on temperature changes and proportion of radiant heat absorption of bottom plate.The influence of regular radiantheat insulating coatings on temperature changes was investigated by experiments.The results show that the major heat transfer mode of bottom plate is the convection,butnot the radiation mode.In forced convection condition,i.e.the relative velocity between the train and the air reaches 5 m/sandradiant heat absorption rateis0.1, proportion of radiant heat absorption of bottom plate is less than 20%.In natural convection condition,i.e. whenthe radiant heat absorption rateis0.1,proportion of radiant heat absorption of bottom plate is less than 35% at the initial stage of temperature changing.Radiant heat absorption of real bottom plate of high-speed train is low compared to regular radiant heat insulating coatings.Extra radiant heat protectionmeasurements are not suggested.关键词
传热/高速列车/地表高温/数值仿真Key words
heat transfer/high-speed train/high temperature ground surface/numericalsimulation分类
交通工程引用本文复制引用
邓小军,董天韵,周伟..高速列车设备舱底板的辐射传热特性[J].中南大学学报（自然科学版）,2016,47(5):1805-1811,7.基金项目
高速铁路基础研究联合基金重点支持项目(U1134203)(Project(U1134203) supported by the Key Fundamental Research Union Funds of High-speed Rails) （U1134203）
