摘要
液氢、液氧等低温推进剂在漏热影响下在轨贮箱压力将逐渐升高,采用热力学排气技术的低温贮箱在常重力环境下开展了压力控制原理验证试验,在对试验系统及热力学排气原理进行分析的基础上,贮箱内压力和液相温度随着时间的变化曲线在混合和并行模式中分别给出,测试结果显示在混合模式中单次控压循环时间逐渐缩短,而在并行模式中随试验开展时间逐渐增加,与混合模式阶段相比,液相温度的上升速率明显降低,验证了热力学排气在控制低温贮箱压力方面的效能。
The pressure of cryogenic tank on orbit with liquid oxygen or hydrogen will increase gradually because of the heat leak from the solar radiation and heat conduction from spacecraft.The validation ground-experiment of liquid nitrogen tank adopting thermodynamic venting system(TVS)technology is carried out at effective storage research workbench.The experiment system is introduced and the running principle of the TVS technology is analyzed,the trend of ullage pressure and liquid temperature in the storage tank with the elapsed time is given in the mixing and parallel running modes.The test result shows that the duration of single cycle in mixing mode lessened gradually,whereas it increases in the parallel mode.Compared to the mixing mode,the rise rate of liquid temperature in parallel mode decreases obviously,which validates that the TVS technology is effective in reducing the mass of exhausted nitrogen gas.
作者
周振君
Zhou Zhenjun(State Key Laboratory of Technologies in Space Cryogenic Propellants,Beijing 100028,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)
出处
《低温工程》
CAS
CSCD
北大核心
2019年第6期68-72,共5页
Cryogenics
关键词
热力学排气
低温贮箱
运行模式
thermodynamic venting system
cryogenic storage tank
running mode
