并行双通道内超临界水流动不稳定性数值分析

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Numerical Analysis of Supercritical Flow Instability in Parallel Dual Channel

1. CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Institute of China, Chengdu, 610041, China;
2. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China

摘要: 采用时域法对超临界水冷堆(SCWR)中可能出现的并行通道流动不稳定性进行分析,建立适用于并行双通道内超临界水流动不稳定性分析的数值计算模型,对质量、动量及能量方程进行隐式差分离散求解,自行编制计算程序SCIA。采用SCIA分析双通道结构堆芯流动特性,计算得到超临界条件下的水动力曲线,研究了系统参数对超临界水流动稳定性的影响规律。结果表明:静态流动不稳定性在SCWR中很难发生;超临界下的系统参数影响规律与亚临界具有相似性。
- 并行双通道 /
- 流动不稳定性 /
- 时域法 /
- 超临界水冷堆
Abstract: Numerical analysis has been carried out for the supercritical flow instability in parallel dual channel by the time-domain approach.The mass.momentum and energy conservation equations are discre-tized using an implicit finite difference scheme.A computer code called SCIA is developed to calculate the flow characteristics in the parallel dual channel.Curves of pressure drop versus flow rate are obtained.Para-metric studies are carried out for the supercritical water in the parallel dual channel.Results show that for supercritical conditions,the static instability can hardly occur,and the parametric effects on flow instability are similar to those in two-phase flows.
- Parallel dual channel /
- Flow instability /
- Time-domain approach /
- Supercritical water-cooled reactors