Characterization of the pneumatic behavior of a novel spouted bed apparatus
Characterization of the pneumatic behavior of a novel spouted bed apparatus
复制标题
新型喷射床装置气动行为的表征
DOI：
10.1016/j.ces.2007.10.023
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发表时间：
2008
影响因子：
5.2
通讯作者：
Ng Niels Deen
中科院分区：
文献类型：
--
作者：
O. Gryczka;S. Heinrich;L. Mörl;J. Kuipers;Ng Niels Deen
最近，喷动床技术在干燥过程以及造粒、团聚或包衣过程中的重要性显著增加。在这项工作中，研究了一种具有两个可调进气口的新型喷动床装置的流体动力学。通过快速傅立叶变换算法和定量粒子图像测速(PIV)对气相压力脉动谱的分析，可以识别不同的工作范围，并以图形方式描述。如果可以观察到均匀且循环的颗粒运动而不出现死区，从而产生相等的气相压力波动，则可以确定稳定的喷动范围。PIV测量得到的粒子速度矢量图和均方根速度图证实了通过分析气相压力波动确定稳定喷动范围的结果。
Recently the importance of spouted bed technology has significantly increased in the context of drying processes as well as granulation, agglomeration or coating processes. Within this work the fluid dynamics of a novel spouted bed plant with two adjustable gas inlets is investigated. By analysis of gas phase pressure fluctuation spectra by means of fast Fourier transformation algorithm and quantitative particle image velocimetry (PIV) measurements, different operation ranges will be identified and depicted graphically. A stable spouting range will be identified if a uniform and circulating particle motion without occurrence of dead zones is observable resulting in equal gas phase pressure fluctuations. Particle velocity vector maps as well as root mean square (rms) velocity plots provided by the PIV measurements confirm the results of the determination of the stable spouting range by analysis of the gas phase pressure fluctuations.