管束间多维两相瞬态流动数值模拟  

Numerical Simulation of Multi-Dimensional Two-Phase Transient Flow across Bundles

作　　者：徐良旺[1] 贾宝山[2] 

机构地区：[1]中科华核电技术研究院有限公司上海分公司,上海200030 [2]清华大学工程物理系,北京100084

出　　处：《核动力工程》2012年第3期28-32,共5页Nuclear Power Engineering

摘　　要：提出一种用于管束间多维两相瞬态流动问题的两流体计算模型及方法。通过引入多孔介质和分布阻力的概念建立拟连续介质的两流体N-S方程,并在多维交错网格上采用全隐格式离散方程,应用强隐式算法(SIP)求解代数方程组。为验证该算法,对釜式再沸器实验进行数值模拟,计算结果与实验值符合较好,表明该算法在数值上可以克服两相不稳定性,适用于模拟管束间多维两相瞬态流动。A multi-dimensional two-fluid model for two-phase flow across bundles is presented. The concept of porous media and distributed resistance are applied to derive the two-fluid Navier-Stokes equation of equivalent continuum, which is discretized with full implicit scheme on multi-dimensional staggered grid and solved with direct Strong Implicit Procedure （SIP）. A numerical simulation of kettle reboiler experiment is implemented for model verification. Good agreement between the numerical results and experimental data is obtained, which proves that the sugguested model is able to handle with two-phase instability numerically and suitable for the simulation of multi-dimensional two-phase transient flow across bundles.

关 键 词：两相 瞬态 多孔介质法 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]