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。 A measuring system of X-ray particle tracking velocimetry (XPTV) was established. The preparation method of tracer particles and the method of measuring and evaluating the position and orientation of tracer particles were established. Based on the above method, the distribution rule of the position and attitude of cylindrical particles under different gas velocities was obtained, and the inherent relationship between the above distribution law and flow pattern was expounded. The results show that when the fluidized bed is bubbling fluidized, the cylindrical particles form an internal circulation and the centerline of the particles is mostly inclined with respect to the vertical direction. When the fluidized bed is fluidized, the cylindrical particles tend to be uniformly distributed in the whole bed , The particle center line tends to vertical direction.