黏性Geldart B类颗粒流化特性实验研究
发布时间:2018-02-11 18:26
本文关键词: 黏性颗粒 X射线层析成像 压力脉动分析 流态化 出处:《工程热物理学报》2017年08期 论文类型:期刊论文
【摘要】: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。
[Abstract]:Based on the multi-source X-ray tomography and the combined algebraic reconstruction algorithm, the three-dimensional morphology of local bubbles in viscous B particle fluidization is reconstructed for the first time in this paper. The experimental results show that the increase of viscous force strengthens the combination of bubbles, resulting in the increase of bubble size and the decrease of frequency and velocity, and when the bed temperature exceeds 35 鈩,
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