Thermodynamic performance of pre-pressurization in a cryogenic tank
Thermodynamic performance of pre-pressurization in a cryogenic tank
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低温储罐预加压的热力学性能
DOI：
10.1016/j.applthermaleng.2016.10.124
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发表时间：
2017-02-05
影响因子：
6.4
通讯作者：
Li, Cui
中科院分区：
文献类型：
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作者：
Liu, Zhan;Li, Yanzhong;Li, Cui
为了给低温贮箱的发射提供更真实的初始物理场，有必要在发射前对贮箱的热力性能进行研究。由于低温推进剂贮箱将经历地面开放停放和地面预增压阶段，本文重点研究了低温液氧贮箱中上述部件的增压性能和温度分布。建立了同时考虑汽液界面相变和外部强制对流换热的CFD模型。结果表明，在地面停车阶段，低温储罐内首先出现强烈的核态沸腾，然后沸腾强度逐渐减弱，最后趋于稳定。随着高温氧气（GOX）注入储罐，储罐压力在设定压力范围内波动。气隙在整个预加压部分期间被冷凝。受罐空传热和外部漏热的影响，热分层随时间的延长而变厚。在本研究中，当环境温度在253.0 K ~ 313.0 K之间变化时，其对储罐压力和液体温度分布的影响并不明显。唯一的大变化是气隙中心线温度随着环境温度的升高而升高，而其他参数变化很小。(C)2016爱思唯尔有限公司版权所有
To supply more actual initial physical field for launch of cryogenic propellant tank, it is necessary to investigate the thermodynamic performance of propellant tank before launch. As cryogenic propellant tank will experience the ground open parking and ground pre-pressurization phase, the present study is particularly to investigate the pressurization performance and temperature distribution in a cryogenic liquid oxygen (LOX) tank for the above parts. One CFD model is established with both the vapor-liquid interface phase change and external forced convection heat exchange considered. The results show that during the ground parking part, the intense nucleate boiling appears in cryogenic tank firstly, then the boiling intensity becomes weak, finally, it tends to be stable. With the high temperature gas oxygen (GOX) injecting into tank, tank pressure fluctuates among the setting pressure limits. The ullage is condensed during the whole pre-pressurization part. Influenced by heat transferring from the ullage and the external heat leakage, the thermal stratified layer becomes thick with time continuing. With the environmental temperature varying from 253.0 K to 313.0 K, its effect on tank pressure and liquid temperature distribution is not so obvious in this study. The unique large change is that the ullage center line temperature increases with the rise of environmental temperature, while the other parameters have slight changes. (C) 2016 Elsevier Ltd. All rights reserved.