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Hydrodynamic modeling of coaxial confined particle-laden turbulent flow

Author

Listed:
  • Liu, Yang
  • Liu, Jiatong
  • Li, Shu
  • Li, Guohui
  • Zhou, Lixing

Abstract

A new particle subgrid scale model is proposed to consider the effect of gas flow on particle motions. Multiphase gas-particle turbulent flow is modeled by a second-order moment two-phase turbulence model involving a four-way coupling strategy to describe the interactions among gas-particle, particle-gas and particle-particle collisions. A large eddy simulation algorithm is developed to solve the hydrodynamic parameters of confined swirling and non-swirling particle-laden flow in coaxial chamber. Results show that predictions are well agreed with experimental data. Vortex structures and vortices distributions of gas and particle flow are quietly different. Coherent structures of swirling particle flows are not observed, and length of recirculation region is almost one quarter of non-swirling flow. Compared to developed flow region of non-swirling flow, standard deviation values of granular temperature at near entrance decreased by 5.5 times. Dominant frequencies of particle number density of non-swirling and swirling flows are 18 Hz and 10 Hz. Particle dispersions exhibit anisotropic characteristics, and their distributions are not in accordance with the normal distribution. The 2D turbulence model needs to be further improved due to the failure of describing vortex stretch in this job.

Suggested Citation

  • Liu, Yang & Liu, Jiatong & Li, Shu & Li, Guohui & Zhou, Lixing, 2023. "Hydrodynamic modeling of coaxial confined particle-laden turbulent flow," Energy, Elsevier, vol. 281(C).
    • Handle: RePEc:eee:energy:v:281:y:2023:i:c:s0360544223015384
    DOI: 10.1016/j.energy.2023.128144
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    References listed on IDEAS

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    1. Abubakar, Zubairu & Shakeel, Mohammad Raghib & Mokheimer, Esmail M.A., 2018. "Experimental and numerical analysis of non-premixed oxy-combustion of hydrogen-enriched propane in a swirl stabilized combustor," Energy, Elsevier, vol. 165(PB), pages 1401-1414.
    2. Asgari, Behrad & Amani, Ehsan, 2017. "A multi-objective CFD optimization of liquid fuel spray injection in dry-low-emission gas-turbine combustors," Applied Energy, Elsevier, vol. 203(C), pages 696-710.
    3. Benim, Ali Cemal & Deniz Canal, Cansu & Boke, Yakup Erhan, 2022. "Computational investigation of oxy-combustion of pulverized coal and biomass in a swirl burner," Energy, Elsevier, vol. 238(PC).
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