微粒污垢沉积率的理论分析与实验研究  

Theoretical analysis and experimental study of particle deposition rate

作　　者：毕月虹[1] RIZZO Gerhard MUELLER-STEINHAGEN Hans 陈林根[3] 

机构地区：[1]北京工业大学建工学院,北京100022 [2]斯图加特大学热力学与热工程研究所,德国斯图加特70550 [3]海军工程大学研究生院,湖北武汉430033

出　　处：《热科学与技术》2007年第3期246-251,共6页Journal of Thermal Science and Technology

基　　金：欧盟资助项目(TheMODSTEEL project;TheEur.Comm.;DGRes.;Growth Progress;Contractnr.G5RD-CT-1999-00066);北京工业大学校管项目资助(97004016200402)

摘　　要：建立了一个小规模实验装置,利用该装置研究了微粒粒径、表面涂层类型、悬浮液温度等因素对微粒污垢沉积率的影响,得到了非常独特的实验结果。悬浮液温度在50℃时,微粒污垢沉积率最大。基于污垢附着机制对这一实验结果进行分析,理论上证实了在某一悬浮液温度微粒污垢沉积率最大,并进一步推导出了微粒污垢沉积率最大时的悬浮液温度与换热面表面自由能之间的关系式。A small-scale experimental device was developed to investigate the effects of particle size, coating type the beginnin and suspension temperature on deposition rate. The results obtained are quite unique. At g stage the maximum deposition rate occurs in suspension with 50 ＂C. Based on the mechanism of adhesion, the experimental results were analyzed and confirmed theoretically that at a certain suspension temperature the deposition rate is maximum. Moreover, the relation between suspension temperature at the maximum deposition rate and surface free energy was deduced.

关 键 词：微粒污垢 沉积率 悬浮液温度 实验研究 理论分析 

分 类 号：TK12[动力工程及工程热物理—工程热物理]