Force measurement and calculation of the large immersed particle in dense gas–solid fluidized bed
Force measurement and calculation of the large immersed particle in dense gas–solid fluidized bed
复制标题
稠密气固流化床中浸入大颗粒的受力测量与计算
DOI：
10.1016/j.powtec.2013.03.013
复制
发表时间：
2013-06
影响因子：
5.2
通讯作者：
He Y Q,et al.
中科院分区：
文献类型：
--
作者：
Zhao Y M;Zhao Y M;He Y Q,et al.;He Y Q,et al.
稠密气固流化床中大颗粒的受力特性是研究大颗粒动力学行为的重要基础。设计了密度为7500 kg/m3、平均直径为8 mm、10 mm和12 mm的钢球作为基本研究对象。采用粗砂颗粒和细玻璃粉作为不同类型的流化介质。利用自行设计的测量系统对不同钢球在不同气体流速下的受力情况进行了测量，得到了钢球受力的波动特性。实验测量结果表明，在气固流化床达到完全流化后，不同粒径的大颗粒浸没力波动基本保持稳定。同时，研究结果表明，选用粗砂颗粒作为流化介质时，同一大颗粒在水中的受力波动更稳定。采用理论计算和数值模拟相结合的方法验证了测量结果的可靠性。对比结果表明，测量结果与计算和仿真结果吻合较好。
The force characteristic of the large immersed particle in the dense gas–solid fluidized bed is the significant foundation to study the kinetic behavior of the large particle. We designed three steel balls with the density of 7500kg/m3and the mean diameters of 8mm, 10mm, and 12mm as the basic investigated objects. The coarse-sand particles and fine-glass powders were employed as different types of fluidized mediums. We used the self-designed measurement system to measure the force values of different steel balls with variable gas velocities, and the fluctuation characteristic of the forces was obtained finally. The experimental measurement results indicate that the force fluctuation of the large immersed particle with different diameters basically keeps stable after achieving the complete fluidization of the gas–solid fluidized bed. Meanwhile, the results show that the force fluctuation of the same large immersed particle is more stable when the coarse-sand particles are selected as the fluidized medium. The approach of theoretical calculation and numerical simulation has been combined to validate the reliability of measurement results. The comparison conclusions indicate that the measurement results agree well with the calculation and simulation results.
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DOI：
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发表时间：
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期刊：
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