Numerical study and analysis of circulated granular flow in high-temperature gas-cooled reactors

被引：0
|
作者：
Yan A. [1 ]
Sun X. [1 ]
Dong Y. [1 ]
机构：
[1] Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2022年 / 43卷 / 08期
关键词：
discrete element method; granular flow patter; high-temperature gas-cooled reactor; pebble flow; pebble-bed reactor; quasi-static granular flow; stagnation effect; Young′s modulus;
D O I：
10.11990/jheu.202203046
中图分类号：
学科分类号：
摘要：
Aiming at the complex granular flow behavior for typical refueling processes inside the pebble-bed core of high-temperature gas-cooled reactors, several numerical simulations and analyses of pebble flow are performed in this research. The discrete element method is applied to simulate such a refueling process in a high-temperature gas-cooled reactor, which realizes the simulation for the extremely slow, intermittent quasi-static pebble flow. Main features of the pebble flow, including velocity profile, streamline profile, and local pebble jamming are discussed under different Young′s modulus and bed heights. The effect of Young′s modulus on the reliability of simulation results is carefully examined and explored. Results reveal a nontrivial effect caused by rigidity and the number of pebbles, indicating that significant flow pattern variations exist within the cone structure with a decrease in the number of pebbles, which transforms from mass flow to funnel flow. The calculation accuracy can be ensured when the Young′s modulus of pebble is not less than approximately 107 Pa. © 2022 Editorial Board of Journal of Harbin Engineering. All rights reserved.
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页码：1205 / 1211
页数：6
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