Mechanism of flow regime transition from bubbling to turbulent fluidization
Mechanism of flow regime transition from bubbling to turbulent fluidization
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DOI：
10.1002/aic.690360619
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发表时间：
1990-06
期刊：
影响因子：
3.7
通讯作者：
P. Cai;Yong Jin;Z.-Q. Yu;Zhifang Wang
中科院分区：
文献类型：
--
作者：
P. Cai;Yong Jin;Z.-Q. Yu;Zhifang Wang
随着流态化研究的不断深入，密相气固两相流态化的研究日益受到人们的关注。通过绘制床层压力脉动-气速曲线，大多数研究人员已经确定了从鼓泡到湍动流态化的临界转变速度。这个临界速度，u{subc}，被定义为对应于该曲线的峰值的速度。然而，这种流型转变的机理还不是很清楚。尽管已经提出了一些尝试，但能够很好地符合实验现象的机制仍然是可用的。本文的重点在于揭示这一机制。
The flow regimes of a dense-phase gas-solid fluidized bed have become a topic of increasing interest as a result of intensive development in fluidization research. Through a plot of the bed's pressure fluctuation vs. gas velocity curve, most investigators have determined the critical transition velocity from bubbling to turbulent fluidization. This critical velocity, u{sub c}, was defined as the velocity corresponding to the peak point of that curve. However, the mechanism of this flow regime transition has not been realized clearly. The mechanism that can fairly fit the experimental phenomena is still not available, although some attempts have been proposed. This paper focused on revealing that mechanism.