Integration of ECT measurements with hydrodynamic modelling of conventional gas-solid bubbling bed
Integration of ECT measurements with hydrodynamic modelling of conventional gas-solid bubbling bed
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DOI：
10.1016/j.ces.2006.11.048
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发表时间：
2007-08-01
影响因子：
4.7
通讯作者：
Ocone, Raffaella
中科院分区：
文献类型：
--
作者：
Makkawi, Yassir;Ocone, Raffaella
电容量层析成像（ECT）提供了在有限体积内固体-气体流动的横截面浓度分布的快速图像。这些信息可以与数值模拟相结合，以估计固体-气体流动中一些最重要的流体动力学量，如颗粒速度、间隙气体速度和颗粒-颗粒接触力。在本研究中，采用双流体方法，通过将数值过程与从ECT测量得到的流化床压降和颗粒浓度像素分布的实验数据相结合，求解了动量和能量平衡方程以及相应的边界条件。给出了河床随时间变化的水动力特性的初步结果。利用已有的鼓泡流化床实验数据对这些结果进行了分析和评价。总的来说，ECT测量与数值模拟的结合为气固流动系统的全面非侵入性信息提供了一种独特而有前途的技术。(c) 2006年Elsevier Ltd出版
The electrical capacitance tomography (ECT) provides fast images of the cross-sectional concentration distribution of solid-gas flow in a confined volume. This information can be integrated with numerical simulation to estimate some of the most important hydrodynamic quantities in solid-gas flow, such as the particles velocity, interstitial gas velocity and particle-particle contact forces.In this study, using the two-fluid approach, momentum and energy balance equations, along with the appropriate boundary conditions, have been solved by integrating the numerical procedure with the experimental data of the fluidised bed pressure drop and pixel distribution of particle concentration available from the ECT measurements. Preliminary results of time-dependent hydrodynamic features of the bed are presented. These results were analysed and assessed using the available experimental literature data on conventional bubbling fluidised bed. In general, it is demonstrated that the integration of ECT measurements with numerical modelling offers a unique and promising technique for comprehensive non-intrusive information on gas-solid flow systems. (c) 2006 Published by Elsevier Ltd.