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本文基于多源X射线层析成像技术及联合代数重建算法(SART)首次重构出黏性B类颗粒流化时局部气泡的三维形态,并结合压力脉动分析技术获得了丰富的全局流态化信息。实验结果表明,黏性力的增加强化了气泡间的合并作用,导致气泡的尺寸上升,频率和速度下降,当床温超过35℃后,节涌状态被激发,并与自由流化状态交替产生。而且,黏性力越大,节涌在流化过程中所占的时间比例越长。
In this paper, based on multi-source X-ray tomography and Joint Algebraic Reconstruction (SART), the three-dimensional morphology of local bubbles during the fluidization of viscous Class B particles is reconstructed for the first time. In addition, the global flow state information. The experimental results show that the increase of viscous force strengthens the merging effect of bubbles and leads to the increase of bubble size and the decrease of frequency and velocity. When the bed temperature exceeds 35 ℃, the rush-in state is excited and alternates with the free-fluid state . Moreover, the greater the viscous force, the greater the proportion of time spent in the fluidization process.