摘要
研究了流化床中固体粒子的几何参数及粒子材料的热物性──导热系数ＫＰ、比热ＣＰ、密度ρｐ等对流化床与埋入表面间传热的影响。实验设备为０．３ｍ×０．３ｍ的矩形截面流化床，床高０．８ｍ，采用空心刚玉球、刚玉砂、镁砂和碳化硅等４类１１种粒子，埋入表面为直径２０ｍｍ的银球及直径为６、１０、１５、２５、３０、４０、５０ｍｍ的碳钢棒。根据作者提出的流化床与埋入表面间传热的表面一颗粒─乳化国传热模型，对以上实验工况进行了理论计算。
The effects of size,density,thermal conductivity and heat capacity of particles on heat transfer are studied. The main experiment equipment is a gas nuidized bed furnace with 0. 3× 0. 3m in cross-section and 0.8in in height. 11 kinds of solid particles, hollowcorundum-sphere, corundum, megnesite and quarts sand, are used, The immersed surfaces are a silver sphere of 20 nun in diameter and steel bars of 6, 10, 15, 20, 30, 40, 50mm in diameter.Using the surface-particle-emulsion heat transfer model developed by the authors the heattransfer between the bed and the surfaces is calculated.
基金
国家教委博士点基金
