板式换热器内颗粒污垢表面分形特性  

Fractal Characteristics of Particle Fouling Surface in Plate Heat Exchangers

作　　者：张仲彬[1] 谢飞帆[1] 董兵[1] 徐志明[1] 

机构地区：[1]东北电力大学能源与动力工程学院

出　　处：《化工机械》2016年第2期157-161,247,共6页Chemical Engineering & Machinery

基　　金：国家自然科学基金资助项目(51476025)

摘　　要：利用分形理论及其相关的图像处理方法对板式换热器内不同粒径的颗粒污垢所沉积的表面形态进行研究。结果表明:颗粒污垢具有分形特性,而且颗粒粒径变化影响污垢表面分形维数,纳米级颗粒污垢的分形维数比微米级颗粒污垢的大。分形维数还可用来定量描述颗粒污垢的孔隙和粗糙表面形貌,分形维数越大污垢表面越粗糙。Having fractal theory and image disposal method based to investigate surface morphology of the dif- ferently-sized particle fouling was implemented to show that, the particle fouling has fractal property and the panicle sizes can influence fouling surface＇ s fractal dimension; and the fractal dimension of nanoparticle foul- ing is bigger than that of the micron particle fouling; and the fractal dimension can be used to quantitatively describe both morphology and porous distribution of the particle fouling surface. The bigger fractal dimension can result in rougher fouling surface.

关 键 词：板式换热器 分形理论 颗粒污垢 

分 类 号：TQ051.5[化学工程]