
1. 上海交通大学机械与动力工程学院
2. 中国船舶工业集团公司第七〇八研究所
Published:2025
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黄文星, 陈天宇, 郭锐, et al. 安全壳抑压水池热分层模型判据研究[J]. 2025, 45(6): 1176-1184.
黄文星, 陈天宇, 郭锐, et al. 安全壳抑压水池热分层模型判据研究[J]. 2025, 45(6): 1176-1184. DOI: 10.20190/j.cnki.02580918.202506014.
在小型反应堆严重事故下可将蒸汽通入抑压水池,通过排放蒸汽到抑压水池实现空间内的降温降压。但是,蒸汽直接接触冷凝可能导致抑压水池内出现热分层现象,影响抑压水池的冷凝效率。本文开展了蒸汽质量通量在20 kg/(m
2
·s)至120 kg/(m
2
·s)范围内的直接接触冷凝实验,揭示了抑压水池热分层的产生机制。通过等效无量纲判据分析,建立了抑压水池热分层现象的最大理查森数判据,当最大理查森数大于1时,池水发生确定分层现象;当最大理查森数位于0.63~1时,池水发生有限分层现象;当最大理查森数小于0.63时,池水处于完全混合状态。同时,建立了无量纲温跃层侵蚀速度模型,将模型预测值与试验数据对比,平均相对误差为15.34%。
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