非对称工况下并联通道流动不稳定性研究  

Research on the Influence of Asymmetric Condition on Flow Instability in Parallel Channels

作　　者：鲁剑超[1] 钱立波[1] 高颖贤[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041

出　　处：《核动力工程》2015年第6期158-162,共5页Nuclear Power Engineering

摘　　要：针对并联矩形通道,基于集总参数法建立了并联通道流动不稳定性分析模型,并基于此模型分析了非对称工况对系统稳定性的影响。分析结果表明,非对称工况对并联通道流动不稳定性有显著影响,在保持平均节流系数恒定的情况下,非对称节流的影响随压力增大而降低,随质量流速增大而增大;界限功率随加热不对称度增加呈先上升后下降趋势,且非对称加热的影响随压力增大而增大,随入口过冷度和质量流速增大而减小。A lumped model for flow instability in parallel channels is built for parallel rectangular channels and the influence of asymmetric condition on flow instability is analyzed theoretically in present work. The results show that the asymmetric conditions play a significant influence on flow instability in parallel channels： by keeping the average throttling constant, the influence of asymmetric throttling increases with the decrease of pressure or with the increase of mass flux; the threshold power is first increase and then decrease with the increase of asymmetric heating, and the influence of asymmetric heating increases with the increase of system pressure while decreases with the increase of inlet subcooling or mass flux.

关 键 词：并联通道 流动不稳定性 非对称工况 

分 类 号：TL333[核科学技术—核技术及应用]