红外加热中物料内部温度场的数值分析  

NUMERICAL ANALYSIS OF TEMPERATURE FIELD IN MATERIALS DURING INFRARED HEATING

作　　者：余其铮[1] 谈和平[1] 

机构地区：[1]哈尔滨工业大学动力工程系,黑龙江哈尔滨150006

出　　处：《红外与毫米波学报》1991年第2期147-155,共9页Journal of Infrared and Millimeter Waves

基　　金：霍英东教育基金会;高等院校青年教师基金

摘　　要：对红外加热技术中物料内部出现温度峰值的条件及响影因素作了探讨,采用了导热与辐射非稳态复合换热的一维模型,对红外加热均匀物性的干物料内温度场作了数值计算。结果表明,物料内部出现温度峰值的主要原因是辐射,并且只有在下列条件同时满足时物料内部才可能出现峰值;(1)表面存在投射辐射;(2)物料表面的透射率不等于零;(3)物料为半透明物料;(4)物料加热表面受到对流冷却,并讨论了物料的吸收系数,折射率,导热系数,换热系数,物料表面辐射特性对温度场的影响。The conditions and factors which determine and affect the temporature peak in the materials during infrared heating are discussed. The temperature fields in dry materials with constant thermal properties during infrared heating are calculated bynumerical method with a transient one-dimensional combined radiative-conductive heat transfer model. The results show that the radiation is the main factor to cause the temperature peak, and the essential conditions for the existence of the temporature peak are the following: (a) there is irradiation on the surface; (b) the transmissivity of the surface is not equal to zero; (c)the material is semi-transparent; (d)the heated surface is cooled by convective heat transfor. The effects of absorption coefficient, refractive index, heat conductivity, convective heat-transfer coefficient and radiative properties of the surf ace on the temperature field are discussed too.

关 键 词：红外加热 物料 温度场 吸收系数 

分 类 号：TN21[电子电信—物理电子学]