In industrial processes such as chemical looping combustion, single-component spouted beds of monodisperse particles are very rarely used but the spouted beds of polydisperse particles have been widely used. The flow characteristics of polydisperse particles are much more complex than the single particle fraction in a fluidized bed. To investigate the gas–solid two-phase flow characteristics of the particles with different diameters in a spouted bed, the segregation and mixing characteristics, bubble morphology, minimum spouting velocity, and pressure fluctuations of the particles with different sizes under different superficial gas velocities are studied experimentally. The results show that higher the initial bed height and larger the volume fraction of the bigger particles, higher is the minimum spouting velocity. Moreover, the magnitude of the minimum spouting velocity increases exponentially with increase in the volume fraction of the bigger particles. At low superficial gas velocity, there is a clear trend of segregation between the particles of different diameters. At moderate superficial gas velocity, the mixing trend among particles of different diameters is enhanced, and the pressure fluctuations in the bed present some degree of regularity. At high superficial gas velocity, the particles of different diameters tend to separate again, the pressure fluctuations become intense, and the particle flow turns into a turbulent state. Furthermore, when the bed becomes stable, the particles of different diameters distribute within the bed with regular stratification.
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August 2018
Research-Article
Experimental Study of Transient Hydrodynamics in a Spouted Bed of Polydisperse Particles
Ling Bai,
Ling Bai
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingbai@ujs.edu.cn
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingbai@ujs.edu.cn
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Weidong Shi,
Weidong Shi
School of Mechanical Engineering,
Nantong University,
Nantong 226019, Jiangsu, China
e-mail: wdshi@ujs.edu.cn
Nantong University,
Nantong 226019, Jiangsu, China
e-mail: wdshi@ujs.edu.cn
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Ling Zhou,
Ling Zhou
Mem. ASME
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingzhoo@hotmail.com
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingzhoo@hotmail.com
Search for other works by this author on:
Lingjie Zhang,
Lingjie Zhang
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: 1435131476@qq.com
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: 1435131476@qq.com
Search for other works by this author on:
Wei Li,
Wei Li
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lwjiangda@ujs.edu.cn
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lwjiangda@ujs.edu.cn
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Ramesh K. Agarwal
Ramesh K. Agarwal
Fellow ASME
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
Search for other works by this author on:
Ling Bai
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingbai@ujs.edu.cn
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingbai@ujs.edu.cn
Weidong Shi
School of Mechanical Engineering,
Nantong University,
Nantong 226019, Jiangsu, China
e-mail: wdshi@ujs.edu.cn
Nantong University,
Nantong 226019, Jiangsu, China
e-mail: wdshi@ujs.edu.cn
Ling Zhou
Mem. ASME
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingzhoo@hotmail.com
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lingzhoo@hotmail.com
Lingjie Zhang
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: 1435131476@qq.com
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: 1435131476@qq.com
Wei Li
Research Center of Fluid
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lwjiangda@ujs.edu.cn
Machinery Engineering and Technology,
Jiangsu University,
Zhenjiang 212013, Jiangsu, China
e-mail: lwjiangda@ujs.edu.cn
Ramesh K. Agarwal
Fellow ASME
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
1Corresponding authors.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received September 19, 2017; final manuscript received February 17, 2018; published online April 13, 2018. Assoc. Editor: Ronald Breault.
J. Energy Resour. Technol. Aug 2018, 140(8): 082206 (8 pages)
Published Online: April 13, 2018
Article history
Received:
September 19, 2017
Revised:
February 17, 2018
Citation
Bai, L., Shi, W., Zhou, L., Zhang, L., Li, W., and Agarwal, R. K. (April 13, 2018). "Experimental Study of Transient Hydrodynamics in a Spouted Bed of Polydisperse Particles." ASME. J. Energy Resour. Technol. August 2018; 140(8): 082206. https://doi.org/10.1115/1.4039614
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