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基于LNG的高速飞机热管理系统设计建模与分析

焦宗夏1,成超乾1,于鹏2,谢宗齐2,李洋1   

  1. 1. 北京航空航天大学
    2. 北京空天技术研究所
  • 收稿日期:2022-05-31 修回日期:2022-09-27 出版日期:2022-09-30 发布日期:2022-09-30
  • 通讯作者: 李洋

Design simulation and analysis of TMS for hypersonic aircraft based on LNG

  • Received:2022-05-31 Revised:2022-09-27 Online:2022-09-30 Published:2022-09-30

摘要: 摘 要:本文针对高速飞机在长时高速飞行中面临的机载热管理系统潜在的超温问题,引入消耗性冷源LNG(Liquid Nat-ural Gas, LNG)设计了一种新型的热管理系统架构。面向最高巡航速度为马赫数7的完整飞行剖面,通过热管理系统动态仿真,对比分析了不同初始条件下引入LNG前后的机载设备、机身结构和发动机滑油冷却系统的温度。结果表明高速飞机引入LNG来提升热管理系统性能具有可行性。在未引入LNG并以燃油为主要热沉时,热管理系统在高速段和返航时由于热沉不足导致系统温控能力下降,机载系统有可能存在长时间的超温现象。引入LNG后高速段和返航时超温问题得到解决,并计算得到了不同起飞环境温度下LNG的消耗量数据,分析了引入LNG后的体积重量代价,通过数据拟合得到LNG消耗量与起飞环境温度的经验公式,为同类型系统设计提供了参考。

关键词: 高速飞机, LNG, 热管理, 温控性能, 代价评估

Abstract: Abstract: In order to solve the problem of the TMS(thermal management system) on hypersonic aircraft, In this paper, The TMS with LNG was designed, through dynamic simulations, analyzed the performance of the TMS. Com-pared the temperature of different heat source at different take-off ambient temperature. The results show that: the heat sink is insufficient and the TMS performance is poor when the aircraft flying at Ma 7 or returns. It provides evi-dence that LNG presence is necessary, if not the aircraft structure and equipment will be overheated for a long time. LNG can make TMS performance improved, the aircraft structure and equipment overheated phenomenon will not occurs when the LNG is used. In order to analyze the compensatory of volume and weight, The LNG consumption data at different temperatures were listed, an empirical formula was calculated by fitting the data, It can provide a reference for TMS design.

Key words: hypersonic aircraft, LNG, TMS, temperature control performance, compensation assessment