期刊
ANNALS OF NUCLEAR ENERGY
卷 115, 期 -, 页码 1-8出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.anucene.2017.12.032
关键词
Pressure gradient; Debris bed; Particle morphology; Effective diameter; Severe accident
资金
- Korea Foundation of Nuclear Safety (KOFONS) - Nuclear Safety and Security Commission (NSSC), Republic of Korea [1305008]
- BK21+ program through the National Research Foundation of Korea - Ministry of Education
Adequate equivalent diameters for non-spherical particles in predicting the pressure drop of fluid flow through particle beds were pursued. A series of experiments to measure the pressure drop of single-phase air flow through particle beds were performed using three kinds of spherical particles (2, 3.5 and 5 mm diameter) and four kinds of cylindrical particles. The experimental data were utilized for evaluating previous models and for proposing a new model, a modified Wu et al. (2008) model with an alternative Ergun constant for the viscous energy loss term. The proposed model agreed well with the pressure drop of single-phase flow through spherical particle beds within 10% in average. The experimental data for cylindrical particle beds also agreed well with the proposed model within 16% in average by applying the equivalent diameter proposed by Li and Ma (2011) as a characteristic size of non-spherical particles. (C) 2018 Elsevier Ltd. All rights reserved.
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