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针对低温液氧充注完成后储箱短期处于过热状态,采用三维模型数值模拟了在地面常压和闭口停放时段里储箱内蒸发速率和温度分层变化特征,对253K、273K、313K三种环境温度对液氧蒸发速率和温度分布的影响规律进行了分析。根据模拟结果可知,受到初始过热度的影响,开口停放结束后三种环境工况下储箱温度最低位置均出现在相界面处,253K、273K、313K环境温度下液氧平均消耗率分别为0.99%/h、1.03%/h、1.28%/h;当排气阀关闭后,三种环境工况下,储箱内液氧温度分布呈现从相界面至储箱底部不断降低趋势,环境温度越高,温度分层越明显;253K、273K、313K工况下相界面液氧蒸发速率在闭口停放后期分别为0.014g/s、0.039g/s、0.058g/s。
In view of the fact that the storage tank was overheated shortly after the filling of cryogenic liquid oxygen was completed, the three-dimensional model was used to simulate the characteristics of stratification of evaporation rate and temperature in the storage tank at atmospheric pressure and closed parking. Three types of 253K, 273K and 313K The effect of ambient temperature on the evaporation rate and temperature distribution of liquid oxygen was analyzed. According to the simulation results, it can be seen that under the influence of the initial superheat, the lowest temperature of the storage tank at the three environmental conditions after the opening is parked is at the phase interface. The average consumption rates of liquid oxygen at 253K, 273K and 313K are respectively 0.99 % / h, 1.03% / h and 1.28% / h respectively. When the exhaust valve is closed, the temperature distribution of liquid oxygen in the tank decreases from the phase interface to the bottom of the tank under the three environmental conditions. And the temperature stratification is more obvious. The liquid oxygen vapor deposition rates at the interface of 253K, 273K and 313K are 0.014g / s, 0.039g / s and 0.058g / s, respectively.