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A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface

Author

Listed:
  • Ming Dong

    (School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China)

  • Jian Han

    (School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China)

  • Sufen Li

    (School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China)

  • Hang Pu

    (School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China)

Abstract

The rebound behavior of fly ash particles normally impacting a planar surface is investigated by using a dynamic model. The three forms of soft sphere physical model are obtained using static/quasi-static contact mechanics and energy dissipation theory. The influences of the particle size, the incident velocity of the particle on the damping coefficient and the impact contact time are all examined. We also predict the critical velocity for three particle sizes. It is found that the variation of the damping coefficient (η) with the normal incident velocity ( v in ) can be roughly divided into the three parts. In the first part, η decreases with increasing v in . In the second part, η is little changed with increasing v in . In the third part, η rapidly increases with increasing v in . For smaller impact velocities, the viscoelastic effect plays a dominant role in the impact process, while for higher incident velocities; the energy dissipation depends mainly on plastic deformation. In addition, the critical velocity shows a distinct dependence on the particle size. Finally, the contact displacement-contact time curves are examined. The work provides a solid basis for the development of a discrete-element-method approach to study ash deposition.

Suggested Citation

  • Ming Dong & Jian Han & Sufen Li & Hang Pu, 2013. "A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface," Energies, MDPI, vol. 6(8), pages 1-20, August.
  • Handle: RePEc:gam:jeners:v:6:y:2013:i:8:p:4288-4307:d:28141
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    Cited by:

    1. Cai, Yongtie & Tay, Kunlin & Zheng, Zhimin & Yang, Wenming & Wang, Hui & Zeng, Guang & Li, Zhiwang & Keng Boon, Siah & Subbaiah, Prabakaran, 2018. "Modeling of ash formation and deposition processes in coal and biomass fired boilers: A comprehensive review," Applied Energy, Elsevier, vol. 230(C), pages 1447-1544.
    2. Yuanhao Shi & Qiang Li & Jie Wen & Fangshu Cui & Xiaoqiong Pang & Jianfang Jia & Jianchao Zeng & Jingcheng Wang, 2019. "Soot Blowing Optimization for Frequency in Economizers to Improve Boiler Performance in Coal-Fired Power Plant," Energies, MDPI, vol. 12(15), pages 1-19, July.
    3. Yuanhao Shi & Jie Wen & Fangshu Cui & Jingcheng Wang, 2019. "An Optimization Study on Soot-Blowing of Air Preheaters in Coal-Fired Power Plant Boilers," Energies, MDPI, vol. 12(5), pages 1-15, March.

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