| 引用本文: | 陈忠灿,汪彬,李鹏,孙培杰,蒋文兵,黄永华.非均匀热流对热力排气系统自增压及排气损失影响[J].哈尔滨工业大学学报,2018,50(8):108.DOI:10.11918/j.issn.0367-6234.201707129 |
| CHEN Zhongcan,WANG Bin,LI Peng,SUN Peijie,JIANG Wenbing,HUANG Yonghua.Effect on self-pressurization and mass loss of thermodynamic vent system by non-uniform heat flux[J].Journal of Harbin Institute of Technology,2018,50(8):108.DOI:10.11918/j.issn.0367-6234.201707129 |
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| 摘要: |
| 热力排气系统(TVS)是通过流体混合与节流换热排气双重作用实现低温推进剂在轨长期贮存的一种有效的压力控制技术.为深入研究推进剂贮箱在轨过程中非均匀受热时热力排气系统的控压特性，在工作于室温温区的TVS模拟装置上，以R141b为气液相变贮存介质，研究非均匀热流(仅气相受热、仅液相受热、气液一侧同时受热)对TVS作用下的贮箱增压特性及排气损失的影响.对比不同部位受热时，贮箱的增压速率、TVS运行特性和排放损失.结果表明，仅贮箱气相区受热时，贮箱升压速率最快，TVS启动频率最高，排放损失最大；仅贮箱液相区受热时，贮箱升压速率最慢，TVS启动频率最低，排放损失最小，相比仅气相区受热分别减少了42%，29%和33%.综合考虑贮箱的增压速率、流体热分层和排气损失，在空间微重力环境下，贮箱内壁面宜进行亲液处理或采用毛细结构来避免气枕空间的直接受热.
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| 关键词: 推进剂贮存 相变 热力排气 非均匀热流 |
| DOI：10.11918/j.issn.0367-6234.201707129 |
| 分类号:V511.6 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51676118);上海航天科技创新基金(SAST2017-017);航天先进技术联合研究中心项目(USCAST2016-32)；载人航天领域预先研究概念创新项目(17630505) |
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| Effect on self-pressurization and mass loss of thermodynamic vent system by non-uniform heat flux |
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CHEN Zhongcan1,WANG Bin1,LI Peng2,SUN Peijie2,JIANG Wenbing1,HUANG Yonghua1
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(1. Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China; 2.Shanghai Aerospace System Engineering Institute, Shanghai 201108, China)
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| Abstract: |
| Thermodynamic vent system (TVS) is deemed as an efficient pressure control technique for long-term on-orbit storage of cryogenic propellants through fluid mixing and a combination of throttling and heat exchanging before venting. To conduct further study on the performance of tank pressure control by TVS under non-uniform heat flux, the effect of non-uniform heat flux (vapor heating only, liquid heating only and one side wall heating for both vapor and liquid) on self-pressurization characteristics and mass loss has been investigated experimentally on a TVS simulator, which works at room temperature and with R141b as the working fluid. The tank pressure rising rate, TVS operation performance, and vent mass loss of different heating condition were compared in detail. The results showed that under the condition of vapor heating mode, the rising rate of the tank pressure is the fastest, the TVS operation frequency and vent mass loss are the highest. However, under the condition of liquid heating mode, the rising rate of the tank pressure is the slowest, the TVS operation frequency and vent mass loss are the lowest, which decreased by 42%, 29% and 33%, respectively, compared with the liquid heating mode. Considering the overall effect by the pressure rising rate, the thermal stratification of the fluid and the vent mass loss, the internal wall surface of the tank is better to have hydrophilic treatment or to integrate capillary structures to avoid direct heating of the ullage in micro-gravity environment.
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| Key words: propellant storage phase change thermodynamic vent non-uniform heat flux |
