| 倾斜下朝向加热表面汽泡行为可视化实验研究 |
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| 引用本文： | 文青龙,陈军,卢冬华,赵华. 倾斜下朝向加热表面汽泡行为可视化实验研究[J]. 核动力工程, 2012, 33(3): 51-55 |
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| 作者姓名： | 文青龙 陈军 卢冬华 赵华 |
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| 作者单位： | 1. 上海交通大学核科学与工程学院,上海,200240;中国核动力研究设计院,成都,610041
2. 中国核动力研究设计院,成都,610041 |
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| 摘 要： | 以AP1000反应堆堆芯熔融物堆内滞留(IVR)策略为研究背景,采用去离子水为工质,在大气压下针对倾斜矩形结构开展下朝向加热表面汽泡行为的可视化实验研究。加热表面倾角从0°变化到30°,矩形窄缝尺寸从3 mm变化到8 mm。可视化观察到下朝向加热表面的汽泡滑移和汽泡变形现象,认为实验本体结构和下朝向加热表面布置是导致汽泡滑移和变形的诱因。通过对临界热流密度触发前后汽-液两相波动现象的可视化分析,认为汽-液波动界面的脱离是触发临界热流密度的主要原因。
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| 关 键 词： | 堆芯熔融物堆内滞留(IVR) 严重事故 临界热流密度 可视化 汽泡行为 |
Visual Experimental Study on Bubble Behavior on Inclined Downward Facing Surfaces |
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| WEN Qing-long , CHEN Jun , LU Dong-hua , ZHAO Hua. Visual Experimental Study on Bubble Behavior on Inclined Downward Facing Surfaces[J]. Nuclear Power Engineering, 2012, 33(3): 51-55 |
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| Authors: | WEN Qing-long CHEN Jun LU Dong-hua ZHAO Hua |
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| Affiliation: | 1.School of Nuclear Science and Engineering,Shanghai Jiaotong University,Shanghai,200240,China; 2.Nuclear Power Institute of China,Chengdu,610041,China |
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| Abstract: | In this paper,in a setting of In Vessel Retention(IVR) strategy of molten core debris in AP1000 reactors,a visual experimental study of bubble behavior and two-phase flow in inclined confined spaces are performed for near-saturated demineralized water at atmospheric pressure with gap sizes of 3mm to 8mm,and inclination angles of 0o to 30o.Bubble sliding and deformation are observed and analyzed.It shows that geometry and downward facing heating surfaces may be two of the reasons leading to these important phenomena.Visual analyses of wavy phenomena between two-phase flow of vapor and liquid have also shown that lift-off of wavy interface between vapor and liquid phase may be the mechanism which triggers the occurrence of critical heat flux(CHF). |
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| Keywords: | IVR Severe accident Critical heat flux Visualization Bubble behavior |
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