摘要
为了提高氢氧模块运载火箭的氢自生增压技术的可靠性,解决箱内小气枕状态下氢自生增压温度过高而导致增压能力过强的问题,开展了基于箱内增压管路换热的闭式增压系统设计。为验证方案的可行性,建立了试验系统,研究了增压管在液氢和气氢两种环境下,不同增压流量和温度工况的换热性能,获得了增压介质换热前后的温度变化情况。试验结果显示:在液氢环境下,增压介质换热效果明显,温度下降较大;同时在气氢环境下换热前后增压介质温度相近。利用大空间池沸腾换热模型对增压管换热进行仿真,与试验结果一致性较好。研究结果表明,基于自生增压管路箱内换热的增压系统具有可行性。
To improve the reliability of hydrogen self-pressurization system in hydrogen-oxy-gen launch vehicles,a closed self-pressurization system was designed based on the heat exchange of the pressurization pipeline to address the issue of excessive pressurization temperature under small ullage conditions.To verify the feasibility of the scheme,an experimental system was estab-lished to study the heat transfer performance under various flow rates and temperatures in both liq-uid and gaseous hydrogen environments.Results show a remarkable heat transfer effect and a sig-nificant temperature drop in the liquid hydrogen environment.Meanwhile,the temperature of pres-surization medium remains similar in gaseous hydrogen environment.The heat transfer of the pres-surization pipeline is simulated using the large-space pool boiling heat transfer model.Simulation results are in good agreement with the experimental findings.The research results indicate the practicality of the scheme and provide a reference for the subsequent development of low-tempera-ture launch vehicles.
作者
曾兆妹
张腾
王佳森
孙善秀
吴姮
马方超
Zeng Zhaomei;Zhang Teng;Wang Jiasen;Sun Shanxiu;Wu Heng;Ma Fangchao(Beijing Key Laboratory of Cryogenic Technology Research,Beijing 100076,China;Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China)
出处
《低温工程》
北大核心
2025年第2期78-84,共7页
Cryogenics
基金
中国航天科技集团有限公司运载火箭动力系统复杂管路随机性压力跳变机理和预测方法研究项目(12402385)。
关键词
液氢
沸腾换热
自生增压
试验研究
liquid hydrogen
boiling heat transfer
self-pressurization
experimental investiga-
