SGTR事故下气泡穿透深度模拟实验

发布时间：2018-08-09 15:24

【摘要】：蒸汽发生器传热管破裂(SGTR)后,气泡在冷却剂中的穿透深度影响铅基冷却反应堆的安全运行。针对中国铅基反应堆SGTR事故,实验营造不同气体泄漏量,利用高速摄影技术对气泡在水介质中的穿透深度特性进行了模拟实验研究。观察了气泡流动流型演化全过程,得到了气泡流型及穿透深度的初步实验数据,并推导出气泡无量纲穿透深度与弗劳德数间的准则关系式,在弗劳德相似准则基础上该关系式可应用于密度比小的气泡在液态金属冷却剂中的注入过程。实验结果表明,在破口面积一定的条件下,气泡穿透深度与气体初始速度呈正比。由量纲分析得到气泡穿透深度关系式与文献的实验结果吻合较好。
[Abstract]:After the steam generator tube ruptures (SGTR), the penetration depth of the bubble in the coolant affects the safe operation of the lead-based cooling reactor. In view of the SGTR accident of lead based reactor in China, different gas leakage was created experimentally. The characteristics of the penetration depth of bubbles in water media were simulated by high speed photography. The whole evolution process of bubble flow pattern is observed, and the preliminary experimental data of bubble flow pattern and penetration depth are obtained, and the criterion relation between bubble dimensionless penetration depth and Froude number is derived. On the basis of Froude's similarity criterion, the formula can be applied to the injection of bubbles with low density ratio into liquid metal coolant. The experimental results show that the penetration depth of the bubble is proportional to the initial velocity of the gas under the condition of a certain fracture area. The equation of bubble penetration depth obtained by dimensional analysis is in good agreement with the experimental results in literature.
【作者单位】：中国科学技术大学;中国科学院核能安全技术研究所中国科学院中子输运理论与辐射安全重点实验室;
【基金】：国家自然科学基金资助项目(11302224) 中国科学院战略性先导科技专项资助(XDA03040000) ITER973专项资助项目(2014GB112002,2014GB116000) 院长火花基金资助项目(YZJJ201328)
【分类号】：TL364.4

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