基于XPTV的流化床异形颗粒分布特性研究  

Investigation on Cylindrical Particle Position Distribution in Fluidized Bed Using XPTV Method

作　　者：钟文琪[1,2] 陈曦[1,2] Aibing Yu 

机构地区：[1]东南大学能源与环境学院,能源热转换及其过程测控教育部重点实验室,南京210096 [2]东南大学-蒙纳士大学联合研究院,颗粒系统模拟与仿真中心,苏州215123 [3]澳大利亚蒙纳士大学化学工程系,克莱顿Vic 3800

出　　处：《工程热物理学报》2017年第7期1384-1391,共8页Journal of Engineering Thermophysics

基　　金：国家自然基金重大项目(No.51390492);国家杰出青年科学基金(No.51325601)

摘　　要：构建了X光颗粒示踪(X-ray particle tracking velocimetry,XPTV)测量系统,建立了示踪颗粒的制备方法以及示踪颗粒位置与姿态取向的测量和误差评估方法。基于以上方法获得了不同气速下圆柱颗粒位置和姿态取向的分布规律,并阐述了以上分布规律与流型之间的内在联系。结果表明,流化床处于鼓泡流化时圆柱颗粒会形成内循环,颗粒中心线与竖直方向多呈倾斜状态;而处于湍动流化时圆柱颗粒则会在全床内趋于均匀分布,颗粒中心线趋于竖直方向。An X-ray particle tracking velocimetry（XPTV） system is designed and built,and the corresponding tracer particle fabrication method is established.With the XPTV system,the cylindrical particle position and orientation determination method and its error evaluation are investigated.Experimental studies on cylindrical particle position and orientation distribution are carried out based on the aforementioned system and methods.The results show that in bubbling fluidization regime,an internal circulation of cylindrical particles forms in the fiuidized bed,and the center axes of most cylindrical particles tend to tilt instead of being vertical.In turbulence fluidization regime,cylindrical particles tend to uniformly disperse across the fiuidized bed,and the center axes of most cylindrical particles are vertical.

关 键 词：流化床 圆柱颗粒 X光颗粒示踪测量 

分 类 号：TK121[动力工程及工程热物理—工程热物理]