喷射泵-液环泵联合抽空液氧过冷方案仿真研究  

Simulation of liquid oxygen sub-cooling process using ejector/liquid ring pump combination vacuum system

作　　者：谭宏博 吴昊[2] 寇西平 杨兴华[3] 陈强[1] Tan Hongbo;Wu Hao;Kou Xiping;Yang Xinghua;Chen Qiang(State Key Laboratory of Aerospace Cryogenic Propellant Technology,Beijing 100028,China;Department of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;High Speed Aerodynamic Institute,China Aerodynamic Research and Development Center,MianYang 621000,China)

机构地区：[1]航天低温推进剂技术国家重点实验室,北京100028 [2]西安交通大学能源与动力工程学院,710049 [3]中国空气动力研究与发展中心高速空气动力研究所,绵阳621000

出　　处：《低温工程》2021年第5期61-67,共7页Cryogenics

基　　金：国家重点研发计划课题(2020YFB1506203);航天低温推进剂技术国家重点实验室基金课题(SKLTSCP202009)。

摘　　要：采用微元方法对液氧抽空过冷的传热传质过程进行仿真模拟,分析了喷射真空泵工作流体流量和压力、最低被引射流体压力和初始液位对于液氧抽空过程的降压特性、抽空时间及剩余液位的影响,获得喷射真空泵与液环泵联合抽真空的液氧过冷系统最佳工作条件:针对本研究液氧贮存系统,当储罐初始液位95%时,采用喷射真空泵工作流体流量为0.25 kg/s、喷射压力为5 MPa,最低被引射流体压力为34.35 kPa,后采用抽速5 m^(3)/min的液环泵,可以18小时内将60 m^(3)的液氧储罐抽空至10 kPa,且剩余液位达75%以上。In the present study,a microelement method based on vectorized programming is used to simulate the heat and mass transfer process of liquid oxygen vacuuming and sub-cooling.The flowrate and pressure of the working fluid for the jet vacuum pump,the minimum ejected fluid pressure and the initial liquid level of the liquid oxygen are analyzed to investigate the influences on the vacuum pressure reduction characteristics,the duration of vacuum extraction and the remaining liquid level of the liquid oxygen tank are investigated in the simulation.The optimal operating conditions of the liquid oxygen sub-cooling system obtained.For the present liquid oxygen storage system,if the initial liquid level of the storage tank is 95%,the working fluid flow rate of the jet pump is 0.25 kg/s,the injection pressure is 5 MPa,the minimum vacuum pressure of the ejector is 34.35 kPa,and a liquid ring pump with a vacuuming capacity of 5 m^(3)/min is used,a liquid oxygen tank of 60 cubic meters can be vacuumed to 10 kPa within 18 hours,and the remaining liquid level is above 75%.

关 键 词：液氧过冷 抽真空系统 喷射真空泵 液环真空泵 仿真 

分 类 号：V511.[航空宇航科学与技术—航空宇航推进理论与工程]