利用三维粒子动态分析仪(PDA)测量了流化床冷态模型中的三维粒子速度,测量了循环流化床内的湍流能量,也对粒子的轴向空隙率进行了测量.实验结果证明了循环床的环一核流动结构的存在,也对循环流化床的气动力特性提供了有价值的数据. The three-dimensional particle velocity in a fluidized bed cold model was measured by a three-dimensional particle dynamic analyzer (PDA), the turbulent energy in the circulating fluidized bed was measured, and the axial voidage of the particles was also measured. The experimental results show that The existence of the ring-core flow structure of the circulating bed also provides valuable data on the aerodynamic characteristics of the circulating fluidized bed.