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为探究低温推进剂预冷管路过程中非稳态两相流动与换热特性,通过文献调研与对比分析,综述了该领域研究进展。分类总结了影响预冷沸腾的主要因素,梳理了数值模拟研究结果,探讨了现有流动沸腾关联式对低温推进剂预冷沸腾过程的适用性,并整理了微重力下低温流体预冷沸腾相关实验研究。研究表明:1)低温流体预冷沸腾可用典型沸腾曲线逆向描述,换热特性与两相流型分布与常温流体流动沸腾相比存在一定差异;2)质量流速、流动方向、工质物性等是预冷沸腾过程流动与换热特性的主要影响因素;3)传统流动沸腾换热关联式不适用于低温流体预冷沸腾换热研究,需进一步拟合低温流体预冷过程关联式。通过梳理低温流体预冷沸腾理论研究和实验进展,提出了开展相关研究的思路与方向,以期为低温推进剂的安全高效加注提供参考和理论依据。
In order to explore the characteristics of unsteady two-phase flow and heat transfer in the pre-cooling pipeline of low-temperature propellant, the research progress in this field was reviewed through literature investigation and comparative analysis. The main factors influencing the pre-cooling and boiling are summarized, and the results of numerical simulation are summarized. The applicability of the existing boiling boiling correlation method to the pre-cooling and boiling process of cryogenic propellants is discussed, and the pre-cooling boiling correlation of cryogenic fluid under microgravity Experimental Study. The results show that: 1) The pre-cooling boil-off of cryogenic fluid can be reversely described by the typical boiling curve. There is a certain difference between the heat transfer characteristics and the two-phase flow pattern distribution compared with the fluid boiling at room temperature. 2) The mass flow rate, flow direction, The main influencing factors on the flow and heat transfer characteristics of the pre-cooling boiling process are as follows: 3) The traditional correlation method for boiling boiling heat transfer is not suitable for the research of pre-boiling boiling heat transfer of cryogenic fluid. By combing theoretical and experimental research on precooling and boiling of cryogenic fluid, some ideas and directions for carrying out relevant researches are put forward in order to provide reference and theoretical basis for safe and efficient filling of cryogenic propellants.