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核技术  2015 

TRISO颗粒缓冲层包覆喷动床气固流动特性

DOI: 10.11889/j.0253-3219.2015.hjs.38.040501, PP. 40501-40501

Keywords: TRISO颗粒,核燃料,喷动床

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Abstract:

TRISO(Tristructuralisotropic)颗粒的包覆层是通过喷动床化学气相沉积法制备的。本研究基于拟流体模型,应用Fluent软件对核燃料缓冲层包覆过程中颗粒性质随时间的变化进行了计算分析,考察了颗粒性质的变化对喷动床气固流动特性的影响。结果表明,随着缓冲层包覆过程中颗粒的直径增大和密度减小,喷泉高度减小,喷射区中的颗粒数量减小,喷射区中的气体升温速率降低,由此影响包覆效率。

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