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增大低温推进剂入轨时的过冷度可显著延长低温燃料在轨贮存期限.通过文献调研与理论分析,介绍了4种低温推进剂过冷度获取方案的工作过程与研究现状,分析了不同方案的优缺点,在此基础上提出了我国开展相关研究的思路.研究表明:1为了减小过冷度获取成本,应采用先加注后冷却的操作程序,且制冷系统尽可能靠近目标贮箱;2液氧、液态甲烷可通过液氮池沸腾提供过冷度;3氦气喷射预冷消耗氦气量巨大,建议仅针对小型液氢采用此技术;4热力学低温流体过冷器(TCS)技术具有总体质量轻、投入能量少等优点,在液氢过冷度获取方面具有可观的应用前景.可为我国开展低温推进剂过冷度相关研究提供参考.
Increasing the degree of undercooling of low temperature propellant into orbit can significantly prolong the storage period of low temperature fuel in orbit.Through literature research and theoretical analysis, the working process and research status of four kinds of low temperature propellant undercooling scheme are introduced, The advantages and disadvantages of different programs, and put forward some ideas on how to carry out relevant research in our country.Research shows that: 1In order to reduce the cost of undercooling, the operating procedure of first cooling after filling should be adopted and the refrigeration system should be as close as possible to the target Tank; 2 liquid oxygen, liquid methane can provide subcooling through liquid nitrogen pool boiling; 3 helium gas jet precooling consumes huge amount of helium, it is recommended to use this technology only for small liquid hydrogen; 4 thermodynamic cryogenic fluid subcooler ) Technology has the advantages of light weight and less input energy, and has a promising prospect in the aspect of obtaining liquid undercooling, which can provide reference for the research on the undercooling of low temperature propellants in China.