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快堆管壳式直流蒸汽发生器发生沸腾传热恶化是不可避免的,由此引起的传热管管壁温度波动会使传热管受到疲劳破坏。研究蒸汽发生器的沸腾传热恶化及热疲劳破坏的实验昂贵,难度较大。本文依据国外已发表的实验结果,建立蒸汽发生器沸腾传热恶化发生时传热管管壁温度及热应力的分析模型,应用数值方法求解,对蒸汽压力、质量流速、钠汽温差变动的影响进行了讨论并给出了主要结论。
It is unavoidable that the heat transfer of the fast reactor shell-and-tube direct-flow steam generator is inevitably caused by the boiling heat transfer. The fluctuation of the heat transfer tube wall temperature caused by the fatigue would be caused by the fatigue of the heat transfer tube. It is more difficult and more difficult to study the deterioration of boiling heat transfer and thermal fatigue failure of steam generator. Based on the published experimental results in foreign countries, an analytical model of heat transfer tube wall temperature and thermal stress in boiling heat transfer degradation is established. The numerical method is applied to analyze the influence of steam pressure, mass flow rate and sodium vapor temperature difference Discussed and given the main conclusions.