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清华大学学报(自然科学版)  2022, Vol. 62 Issue (10): 1645-1659    DOI: 10.16511/j.cnki.qhdxxb.2021.25.26
  核能与新能源技术 本期目录 | 过刊浏览 | 高级检索 |
流化床-化学气相沉积颗粒包覆过程数值模拟
陈猛, 陈昭, 刘荣正, 刘兵, 邵友林, 唐亚平, 刘马林
清华大学 核能与新能源技术研究院, 北京 100084
Numerical simulations of particle coating using the fluidized bed-chemical vapor deposition method
CHEN Meng, CHEN Zhao, LIU Rongzheng, LIU Bing, SHAO Youlin, TANG Yaping, LIU Malin
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
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摘要 利用流化床-化学气相沉积(fluidized bed-chemical vapor deposition, FB-CVD)技术制备包覆燃料颗粒是高温气冷堆燃料元件生产过程中的关键工艺之一,该文首先分析了FB-CVD颗粒包覆过程的特点,并综合流化床中的速度场、温度场、浓度场及CVD模型建立了CFD-DEM-CVD多物理场多尺度耦合模型用于颗粒包覆过程的研究。然后从多个方面优化包覆模型,分别提出了CRF模型用于模拟物质的分解和沉积过程, PBM模型用于求解沉积组分的尺径分布及IBP模型用于求解包覆颗粒密度的改变。将该文提出的包覆模型用于实际的案例计算发现,模拟结果和实验结果吻合较好,验证了模型的可靠性和准确性。该文建立的颗粒包覆模型可以作为一种基础理论模型拓展颗粒学学术研究范畴,还可用于颗粒包覆过程的研究,为实际的工业生产提供理论指导。
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陈猛
陈昭
刘荣正
刘兵
邵友林
唐亚平
刘马林
关键词 颗粒包覆流化床-化学气相沉积(FB-CVD)数值模拟CFD-DEM多尺度耦合    
Abstract:The preparation of coated fuel particles using fluidized bed-chemical vapor deposition (FB-CVD) is one of the key processes in the production of fuel elements for high-temperature gas-cooled reactors.The characteristics of the particle coating process were predicted using a multi-physics,multi-scale,coupled CFD-DEM-CVD model to predict the velocity,temperature,and concentration fields for the CVD method in fluidized beds.Then,the coating method was modeled using a chemical reaction flow model to simulate the decomposition and deposition of the chemical substances with the population balance model used to solve for the size distribution of the deposited components and the inner bonding particle model used to predict the changes in the coating particle density.This coating model was used to simulate various cases with the simulation results in good agreement with experimental data.This coating model can be used to study the particle coating process and optimize coating processes for industrial production.
Key wordsparticle coatings    fluidized bed-chemical vapor deposition (FB-CVD)    numerical simulations    CFD-DEM    multi-scale coupled
收稿日期: 2021-01-08      出版日期: 2022-09-03
基金资助:刘马林,副教授,E-mail:liumalin@tsinghua.edu.cn
引用本文:   
陈猛, 陈昭, 刘荣正, 刘兵, 邵友林, 唐亚平, 刘马林. 流化床-化学气相沉积颗粒包覆过程数值模拟[J]. 清华大学学报(自然科学版), 2022, 62(10): 1645-1659.
CHEN Meng, CHEN Zhao, LIU Rongzheng, LIU Bing, SHAO Youlin, TANG Yaping, LIU Malin. Numerical simulations of particle coating using the fluidized bed-chemical vapor deposition method. Journal of Tsinghua University(Science and Technology), 2022, 62(10): 1645-1659.
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http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2021.25.26  或          http://jst.tsinghuajournals.com/CN/Y2022/V62/I10/1645
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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