CFD investigation on helium pressurization behaviors in liquid hydrogen tank
CFD investigation on helium pressurization behaviors in liquid hydrogen tank
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液氢罐氦气增压行为的CFD研究
DOI：
10.1016/j.ijhydene.2017.10.145
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发表时间：
2017-12
影响因子：
7.2
通讯作者：
Li Yanzhong
中科院分区：
文献类型：
--
作者：
Wang Lei;Ye Shixuan;Ma Yuan;Wang Jiaojiao;Li Yanzhong
增压系统在航天飞行任务中起着重要作用，而不凝氦通常用于为低温推进剂贮箱提供增压作用。本文研究了氦气对低温推进剂贮箱增压特性的影响，并引入了一种可同时考虑组分传递及其对相变影响的增强计算流体动力学（CFD）方法来辅助分析。选取主动氦增压后减压和增压排气两种增压过程作为研究对象，获得并分析了压力响应、组分浓度分布以及传质量的演变规律。结果表明，加压过程中的物种转移与加压时间密切相关。当加压持续在几百秒内时，多组分效应通常对热力学性能具有相对小的影响。然而，当多物种系统经历较长的时间，物种转移效应出现。对于预加压操作后的减压性能，在氦存在的情况下，残余氦导致减压中的连续液体蒸发，而纯氢情况下经历蒸气可冷凝过程。此外，氦和氢可以在减压期间充分地彼此扩散。对于典型的加压放电过程，组分扩散及其对传质速率的影响对物理场分布有一定的影响，但对总体加压性能的影响很小。物质浓度沿着径向方向导致可区分的径向温度梯度。总的来说，本研究给出了一个清晰的展示的压力和热力学行为的增压使用氦气。通过本CFD模型，可以得到多组分的扩散及其对相变速率的影响。
Pressurization system plays a significant role in aerospace missions, and non-condensable helium is usually used to provide pressurization effect to a cryogenic propellant tank. In the present paper, the helium effect on the pressurization behaviors of cryogenic propellant tanks are concerned and investigated, and an enhanced computational fluid dynamic (CFD) approach, which could simultaneously account for the species transfer as well as its effect on phase change, is introduced to assist the analysis. Two pressurization events, including depressurization after an active helium pressurization and pressurized discharge process, are selected as the research objectives, and the pressure responses, species concentration distribution, as well as mass transfer amount evolutions are obtained and analyzed. The results show that species transfer on pressure behaviors is strongly related to the pressurization time. When a pressurization lasts within several hundred seconds, the multicomponent effect generally has a relatively small influence on the thermodynamic performance. However, when the multispecies system experiences a longer time, the species transfer effect appears. For the depressurization performance after a pre-pressurization operation, the residual helium in the helium-existence case leads to a continuous liquid evaporation in the depressurization, while a pure hydrogen case experiences a vapor condensable process. Moreover, the helium and hydrogen could sufficiently diffuse with each other within the depressurization period. For a typical pressurized discharge process, the species diffusion as well as its effect on mass transfer rate affects the physical field distribution in a certain degree but a weak influence on the general pressurization performance. The specie concentration along radial direction causes a distinguishable radial temperature gradient. Generally, the present study gives a clear exhibition on the pressure and thermodynamic behaviors of pressurization using helium. Through the present CFD model, the multicomponent diffusion as well as its influence on phase change rate could be achieved.
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DOI：
10.2514/6.2012-5199
发表时间：
2012-09
期刊：
--
影响因子：
--
作者：
C. Ludwig;M. Dreyer
通讯作者：
C. Ludwig;M. Dreyer
DOI：
10.1016/j.ijheatmasstransfer.2017.01.044
发表时间：
2017-05
影响因子：
5.2
作者：
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M. Sheikholeslami;T. Hayat;A. Alsaedi
DOI：
10.1016/j.ijheatmasstransfer.2013.03.021
发表时间：
2013-07
影响因子：
5.2
作者：
Lei Wang;Yanzhong Li;Zhixiang Zhao;Zhan Liu
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DOI：
10.2514/6.2016-4673
发表时间：
2016-07
期刊：
--
影响因子：
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作者：
Olga V. Kartuzova;M. Kassemi
通讯作者：
Olga V. Kartuzova;M. Kassemi
DOI：
10.1007/s40430-014-0228-x
发表时间：
2015-05-01
影响因子：
2.2
作者：
Sheikholeslami, Mohsen;Ganji, Davood Domiri
通讯作者：
Ganji, Davood Domiri