原子能科学技术Issue(4)：604-609,6.DOI:10.7538/yzk.2014.48.04.0604
轴向非均匀加热对并联通道流动不稳定性的影响
Analysis of Flow Instability in Parallel Channels Under Axial Non-uniform Heating Condition
摘要
Abstract
Based on the homogeneous flow model , the system control equations of parallel channels were established .Semi-implicit finite-difference method with staggered mesh was used to discretize the system control equations solved with a chasing method to simulate the two-phase flow behavior of parallel channels .The cosine heat flux was selected to simulate the axial non-uniform heating . The marginal stability boundary (MSB ) and three-dimensional instability space under different system pressures , different inlet subcoolings and different axial heating modes were obtained by using small perturbation method . The stability of parallel channels increases with system pressures for both cosine and uniform heat flux .At high inlet subcooling region ,the cosine heat flux can strengthen the system stability .However ,at low inlet subcooling region ,the negative effect on the system stability will be caused by cosine heat flux .For the cosine heat flux ,the increase of inlet resistant coefficient will move the turning point of the MSB to high inlet subcooling number and enhance the system stability .关键词
轴向非均匀加热/并联通道/流动不稳定性/三维不稳定性空间Key words
axial non-uniform heating/parallel channel/flow instability/three-dimen-sional instability space分类
能源科技引用本文复制引用
鲁晓东,周铃岚,巫英伟,苏光辉,秋穗正,张虹..轴向非均匀加热对并联通道流动不稳定性的影响[J].原子能科学技术,2014,(4):604-609,6.基金项目
核反应堆系统设计技术重点实验室基金资助项目 （）
