原子能科学技术2016，Vol.50Issue(8)：1369-1374,6.DOI:10.7538/yzk.2016.50.08.1369
颗粒-壁面相互作用对石墨粉尘在高温气冷堆蒸汽发生器换热管表面沉积过程的影响
Effect of Particle-wall Interaction on Graphite Dust Deposition on HTGR Steam Generator Tube
摘要
Abstract
The deposition of graphite dust on steam generator (SG)tubes is a highly concerned issue for operation and maintenance of high-temperature gas-cooled reactor (HTGR),as the distribution of radioactivity is directly affected.In this paper,the computational fluid dynamics (CFD)study on graphite dust deposition on SG tubes was presented,with emphasis of the particle-wall interaction.From a view of kinetic energy dissipation,a critical capture velocity model was adopted to account for particle-wall collisions and incorporated into CFD simulation.The results show that the hit-and-stick assumption significantly overestimates the deposition rate of graphite dusts. With reasonable consideration of particle rebound,the deposition rate first increases then decreases with particle diameter increasing,showing a maximum at 3 μm.The analysis of spatial distribution indicates that largest deposition rates appear on middle rows of tubes.关键词
高温气冷堆/石墨粉尘/沉积/蒸汽发生器换热管/颗粒-壁面相互作用Key words
high-temperature gas-cooled reactor/graphite dust/deposition/steam gen-erator tube/particle-wall interaction分类
能源科技引用本文复制引用
魏明哲,张易阳,吴莘馨,雒晓卫..颗粒-壁面相互作用对石墨粉尘在高温气冷堆蒸汽发生器换热管表面沉积过程的影响[J].原子能科学技术,2016,50(8):1369-1374,6.基金项目
国家自然科学基金青年科学基金资助项目(51406097) （51406097）
清华大学自主科研计划资助项目(20151080381) （20151080381）
