Nuclear Engineering and Technology

  • 제55권3호
  • /
  • Pages.1105-1117
  • /
  • 2023
  • /
  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Experimental study on single- and two-phase flow behaviors within porous particle beds

  • Jong Seok Oh (School of Energy System Engineering, Chung-Ang University) ;
  • Sang Mo An (Korea Atomic Energy Research Institute) ;
  • Hwan Yeol Kim (Korea Atomic Energy Research Institute) ;
  • Dong Eok Kim (School of Energy System Engineering, Chung-Ang University)
  • 투고 : 2022.06.07
  • 심사 : 2022.10.30
  • 발행 : 2023.03.25
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초록

In this study, the pressure drop behavior of single- and two-phase flows of air and water through the porous beds filled with uniform and non-uniform sized spherical particles was examined. The pressure drop data in the single-phase flow experiments for the uniform particle beds agreed well with the original Ergun correlation. The results from the two-phase flow experiments were analyzed using numerical results based on three types of previous models. In the experiments for the uniform particle beds, the data on the two-phase pressure drop clearly showed the effect of the flow regime transition with a variation in the gas flow rate under stagnant liquid condition. The numerical analyses indicated that the predictability of the previous models for the experimental data relied mainly on the sub-models of the flow regime transitions and interfacial drag. In the experiments for the non-uniform particle beds, the two-phase pressure loss could be predicted well with numerical calculations based on the effective particle diameter. However, the previous models failed to accurately predict the counter-current flooding limit observed in the experiments. Finally, we propose a relation of falling liquid velocity into the particle bed by gravity to appropriately simulate the CCFL phenomenon.

키워드

과제정보

This work was supported by the Korean Institute of Energy Technology Evaluation and Planning (KETEP) granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20193110100090).

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