航天推进技术研究院主办
[1]曹 伟,王 睿,陈 剑,等.推进剂管路内负压形成机理研究[J].火箭推进,2015,41(04):37-42.
CAO Wei,WANG Rui,CHEN Jian,et al.Research on formation mechanism of negative pressure phenomenon in propellant pipeline[J].Journal of Rocket Propulsion,2015,41(04):37-42.
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CAO Wei,WANG Rui,CHEN Jian,et al.Research on formation mechanism of negative pressure phenomenon in propellant pipeline[J].Journal of Rocket Propulsion,2015,41(04):37-42.
推进剂管路内负压形成机理研究
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
41
期数:
2015年04期
页码:
37-42
栏目:
研究与设计
出版日期:
2015-09-30
- Title:
- Research on formation mechanism of negative pressure phenomenon in propellant pipeline
- 分类号:
- V434-34
- 文献标志码:
- A
- 摘要:
- 嫦娥三号着陆器推进系统正样产品在测试过程中，轨控推进剂管路出现了一段时间的负压现象，为查找负压出现的原因，推进系统采用故障树分析方法对推进剂管路内负压形成机理进行了研究，并基于故障树分析结论，进行了单机级、系统级的多项专项验证试验，通过试验研究最终确认了推进剂管路内负压形成机理，该现象是由于嫦娥三号着陆器推进系统检漏时采用纯氦气工质，检漏结束后常压氦气长期存储在推进剂管路内，由于管路内纯氦气浓度远高于外界空气，存在氦气分子通过断流阀微通道缓慢扩散出去现象，随着扩散量的不断下降积累，导致推进剂管路内压力逐步减小，产生了负压。该现象与分子扩散理论的机理和规律相符，为系统正常固有现象，对飞行试验无影响。
- Abstract:
- During testing process of landing propulsion system in Chang'e-3, the negative pressure phenomenon was detected in the propellant pipeline for orbit control. Fault tree analysis method was used to investigate the formation mechanism of the negative pressure phenomenon. Single level and system level validation tests were conducted based on the analytical results from fault tree analysis method. The formation mechanism of the negative pressure phenomenon was confirmed by experiments and investigation. The phenomenon is caused by helium, which is used in the leak hunting of Chang'e-3 propulsion system, and then stayed in the pipeline for a long time. Helium concentration in the pipeline is far higher than the air in environment, so helium molecular diffusion occurs with pressure drop in the system, and the negative pressure phenomenon is appeared. The negative pressure phenomenon coincides
参考文献/References:
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备注/Memo
收稿日期：2015-02-06；修回日期：2015-03-27 基金项目：中国航天科技集团公司支撑项目（2012JY03） 作者简介：曹伟（1981—），男，高级工程师，研究领域为液体火箭发动机系统设计
更新日期/Last Update:
1900-01-01