Numerical Simulation of Effect of Different Hydrogen Production Rates on Hydrogen Distribution within Containment
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摘要: 利用计算流体力学软件(CFX),初步研究了严重事故下氢气在安全壳空间内的流动特性,分析了不同产氢速率对安全壳内氢气分布的影响。结果表明:各种氢气释放速率情况下,氢气分布的基本趋势一致;不同的产氢速率对氢气分布的影响主要体现在氢气运动到安全壳穹顶时所形成的涡旋不同,氢气释放速率低的序列,氢气容易滞留在穹顶,然后向下慢慢扩散,分布较均匀;氢气释放速率高的序列的氢气运动方向性强,容易向下空间运动,分布的区域集中些,分层现象明显。Abstract: Flow characteristics of hydrogen gas in the containment is preliminarily studied by CFD code CFX. The result suggests that the basic trend of the hydrogen distribution is the same at various hydrogen release rates, and effects of different hydrogen production mainly on the hydrogen distribution are the different spiral formed when the hydrogen moves to the dome of the containment, the hydrogen kinetic energy would be lower and distribution area are larger and evener for the sequence with lower hydrogen release rate, and the hydrogen kinetic energy is higher and distribution area is more centralized in the higher hydrogen production rate accident.
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Key words:
- Hydrogen risk /
- Hydrogen production rates /
- Distribution effect /
- Numerical simulation /
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