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针对初始过热充注的液氧储箱内温度分层现象,通过数值模拟对储箱在停放过程中低温工质温度场的变化特征进行研究,同时分析了初始过热度以及漏热形式对温度发展规律的影响。研究表明:常压停放过程中,受到液体初始过热度的影响,储箱内液氧温度呈现从汽液界面至底部逐渐升高的趋势,与实验结果相一致;液体初始过热度越大,相界面蒸发速率越快,同一时刻对应气枕区的温度越低;增加气枕区绝热性能相对于底端绝热更有助于储箱内状态尽快稳定。
In view of the temperature stratification in the initial overheating liquid oxygen storage tank, the changing characteristics of the temperature field in the low temperature working fluid during the parking process of the tank were studied by numerical simulation. The effects of the initial overheating and the leakage form on the temperature development The law of influence. The results show that during the normal pressure parking, the temperature of the liquid oxygen in the tank gradually increases from the vapor-liquid interface to the bottom due to the initial superheat of the liquid, which agrees with the experimental results. The larger the initial superheat of the liquid, The faster the interface evaporation rate, the lower the temperature at the same time corresponds to the area of the gas pillow; the increase of the thermal insulation performance of the gas pillow area is more conducive to the stable state within the storage tank as soon as possible.