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数值模拟了大型液氧贮箱停放阶段液氧与气枕区的热分层特征,根据模拟结果分析了液氧贮箱热分层厚度演化规律。结果表明:液氧的温度分层厚度随时间增长先增加后保持不变。外界环境温度的变化会在一定程度上影响着贮箱侧壁处的温度分布,但是对于其温度分层厚度并没有显著的影响。气枕区热分层现象比液氧区更加明显。
The thermal stratification characteristics of liquid oxygen and gas pillow area during the parking phase of large liquid oxygen storage tank are numerically simulated. Based on the simulation results, the evolution of thermal stratification thickness of liquid oxygen storage tank is analyzed. The results show that the temperature stratification thickness of liquid oxygen increases first and then remains unchanged with the increase of time. The change of external ambient temperature will affect the temperature distribution at the side wall of the tank to a certain extent, but it has no significant effect on the temperature stratification thickness. Pneumocapillary zone thermal stratification is more obvious than the liquid oxygen zone.