中文摘要：

通过采用牛顿冷却定律与傅里叶实验定律,对金属管壁、管内壁和管外壁换热方式分别进行了分析,同时通过对边界条件进行综合,得到了空气温度与导热油温度、流量以及空气速度之间的动态关系。仿真与实验结果中该模型与实际系统的动态与静态特性相对符合,统计数据与分析表明模型精度能够满足实际应用要求。

英文摘要：

By adopting Newton＇s Cooling Law,heat transfers between fluid and surfaces of metal tube（heat transfer oil and internal metal tube surface,cold air and external surface of metal tube）are illustrated respectively.Then based on Fourier Experiment Law,heat transfer inside inner metal tube is introduced,and boundary condition is presented.At last,dynamic relationship between hot air temperature,flux and temperature of heat transfer oil,flux of air is summarized.Simulation and experiment show that dynamic and static characters between model and real plant are coincident.Static data show that mean and standard deviation are all less than 5%,which means model is exact enough for practice application.Moreover,cause of error is analyzed.