不同湍流模型对氢气分布影响的数值研究
发布时间：2018-10-24 19:48
【摘要】：研究严重事故下安全壳内氢气分布有利于评估氢气风险。本文采用三维CFD方法对THAI装置HM2试验进行建模,并分别使用代数模型和k-ε模型模拟氢气分层形成以及破坏过程。分析结果表明,CFD模拟结果与实验数据基本符合,在模拟中可观察到氢气分层现象的形成以及水蒸气对氢气分层的逐步破坏与混合过程;在氢气注射阶段,代数模型和k-ε模型的模拟结果接近,能够反映氢气浓度分层的形成过程;在水蒸气注射阶段,代数模型基于半经验的混合长度理论,在模拟装置较复杂几何结构内水蒸气流动对氢气分层的破坏作用时并不十分理想,标准k-ε模型对装置各测点氢气浓度达到一致的时间预测与试验结果较为接近。
[Abstract]:It is helpful to evaluate hydrogen risk by studying hydrogen distribution in containment under severe accident. In this paper, the three-dimensional CFD method is used to model the HM2 test of THAI plant, and the algebraic model and k- 蔚 model are used to simulate the stratification formation and failure process of hydrogen, respectively. The results show that the CFD simulation results are in good agreement with the experimental data. The formation of hydrogen stratification and the gradual destruction and mixing process of water vapor on hydrogen stratification can be observed in the simulation. The simulation results of algebraic model and k- 蔚 model are close, which can reflect the formation process of hydrogen concentration stratification, and at the stage of steam injection, the algebraic model is based on semi-empirical mixing length theory. The effect of water vapor flow on hydrogen stratification in complex geometry is not ideal, and the standard k- 蔚 model is in good agreement with the experimental results.
【作者单位】： 上海交通大学机械与动力工程学院;
【基金】：国家科技重大专项资助项目(2015ZX06004003-001)
【分类号】：TL364.3
[Abstract]:It is helpful to evaluate hydrogen risk by studying hydrogen distribution in containment under severe accident. In this paper, the three-dimensional CFD method is used to model the HM2 test of THAI plant, and the algebraic model and k- 蔚 model are used to simulate the stratification formation and failure process of hydrogen, respectively. The results show that the CFD simulation results are in good agreement with the experimental data. The formation of hydrogen stratification and the gradual destruction and mixing process of water vapor on hydrogen stratification can be observed in the simulation. The simulation results of algebraic model and k- 蔚 model are close, which can reflect the formation process of hydrogen concentration stratification, and at the stage of steam injection, the algebraic model is based on semi-empirical mixing length theory. The effect of water vapor flow on hydrogen stratification in complex geometry is not ideal, and the standard k- 蔚 model is in good agreement with the experimental results.
【作者单位】： 上海交通大学机械与动力工程学院;
【基金】：国家科技重大专项资助项目(2015ZX06004003-001)
【分类号】：TL364.3
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