化工学报2016，Vol.67Issue(z2)：20-25,6.DOI:10.11949/j.issn.0438-1157.20161347
液氢贮箱热力学排气系统建模及控压特性
Modeling and pressure control characteristics of thermodynamic venting system in liquid hydrogen storage tank
摘要
Abstract
To study the pressure control of cryogenic propellant container,an analytical lumped parameter model is established to predict the behavior of pressure variation inside a liquid hydrogen tank with TVS installed.Simulations are conducted for the tank with volume of 18.09 m3 initially filled with 75% LH 2 and with a heat leak load of 0.76 W · m-2.Calculation results are compared with literature to verify the feasibility of the proposed model.The results show that the ullage pressure rises much faster than the liquid saturation pressure,and TVS is highly effective and feasible in controlling the tank pressure within 1 65.5—172.4 kPa.The pressure change characteristics under mixing mode and venting mode are compared and analyzed.The pressure decreasing rate under venting mode is found to be 7 times of that under mixing mode.However,the pressure rising rate under venting mode is about 95% of that under mixing mode.The temperature profiles are also studied.关键词
液氢贮箱/热力学排气系统/压力控制/仿真分析Key words
liquid hydrogen tank/thermodynamic vent system/pressure control/simulation analysis分类
航空航天引用本文复制引用
汪彬,王天祥,黄永华,吴静怡,雷刚..液氢贮箱热力学排气系统建模及控压特性[J].化工学报,2016,67(z2):20-25,6.基金项目
航天低温推进剂技术重点实验室基金课题项目(SKLTSCP1206-W) （SKLTSCP1206-W）
国家自然科学基金项目(51676118)。@@@@supported by the Open Research Fund of the State Key Laboratory of Technologies in Space Cryogenic Propel ants (SKLTSCP1206-W)and the National Natural Science Foundation of China (51676118) （51676118）
