液氧管路POGO低温环境模拟试验系统设计及研究  

Design and Research of Low-temperature Environment Simulation System in POGO of Liquefied Oxygen Pipeline

作　　者：高飞[1] 刘康娜[2] 侯京锋[1] 于杨[1] 李文宇[1] GAO Fei;LIU Kangna;HOU Jingfeng;YU Yang;LI Wenyu(Beijing Institute of Structure and Environment Engineering,Beijing,100076;Beijing Institute of Aerospace Technology,Beijing,100074)

机构地区：[1]北京强度环境研究所,北京100076 [2]北京航天试验技术研究所,北京100074

出　　处：《导弹与航天运载技术（中英文）》2023年第6期126-131,共6页Missiles and Space Vehicles

摘　　要：液体运载火箭在飞行时,由于推进系统中的推进剂压力和流量脉动与结构系统弹性振动之间的耦合作用,将产生闭环自激振。为获得推进剂输送管路的动特性参数,需进行地面POGO试验。针对试验要求,设计了地面液氧管路POGO低温环境模拟试验系统,采用液氮替代液氧作为输送介质,全过程压力、流量闭环控制,设计了试验管路边界条件,真实模拟了液氧管路的工作状态,达到了液氧管路压力稳定和大流量液氮输送的要求。采用液氮循环设计思路,使液氮循环重复使用,提高了液氮的利用率。实际试验结果表明液氧管路POGO低温环境模拟试验系统满足指标要求,压力控制稳定、流量达到各状态要求。The coupling between the pressure and flow pulsation the vibration of the structure,product system self excitation in the course of liquid rocket fight.In order to obtain the dynamic characteristic parameters of liquid oxygen pipeline,POGO test is needed.Low temperature environment simulation test system is designed and applied to POGO test of liquid oxygen pipeline,and the system uses liquid nitrogen instead of liquid oxygen.The algorithm of pressure closed-loop control and flow closed-loop control is designed in the test system.The experimental boundary conditions are designed to simulate the working state of the liquid oxygen pipeline.The utilization rate of liquid nitrogen is increased by adopting liquid nitrogen recycling.The test results show that the test system has achieved the design targets.

关 键 词：低温环境试验 POGO试验 压力控制 流量控制 PID控制 

分 类 号：V416.5[航空宇航科学与技术—航空宇航推进理论与工程]