低温推进剂热分层研究

Research on Cryogenic Propellant Thermal Stratification

通过详细分析热分层产生的机理,阐述了低温流体热分层所引起的流体温度分布、气液界面现象以及箱体压力增加过程。对有关流体热分层的试验研究以及数值模拟的文献进行了整理;对不同低温流体工质、箱体初始设置参数及尺寸参数、箱体形状、壁面曲率大小、壁面是否加肋片以及箱体晃动旋转等对热分层的影响进行了分类总结;对不同热分层数学物理模型进行了系统对比。介绍了不同重力水平下,流体流动状态与热分层的关系。归纳了有关热分层现象的一些重要结论,阐明了我国在该领域开展研究的必要性。最后指出低温流体热分层对推进剂箱体优化设计及安全运行的重要意义。

The mechanism of fluid thermal stratification is analyzed in detail. The fluid temperature distribution, the gas-liquid interface transportation phenomena and the tank pressurization process caused by thermal stratification are elaborated briefly. Experimental research and numerical simulation for fluid thermal stratification are reorganized. The influences of different cryogenic fluid, different tank initial parameters and size parameters, different tank shapes, different wall curvatures, wall with rib or not, tank slosh and rotation on the fluid thermal stratification are classified and summarized. Systematic Comparisons are made between different thermal stratification mathematical-physical models. The relationship between fluid flow and thermal stratification under different gravity conditions is introduced. Some important conclusions about the fluid thermal stratification are obtained and the necessities for the associated research of thermal stratification in our country are explained as well. Finally, it is revealed that cryogenic propellant thermal stratification is important for optimization design of the propellant tank and its safety storage.