摘要
液体火箭发动机氧路系统低频动特性研究是进行运载火箭POGO振动分析和判别的必要工作。以某型液氧/煤油补燃循环火箭发动机为研究对象,采用模块化建模方法建立了基于自动控制理论的发动机氧路系统线性小偏差的传递矩阵模型,分别对发动机氧路系统和试车台氧化剂输送系统动特性进行数值仿真,并对比分析了试车数据和仿真结果。研究表明,数学模型和计算方法具有一定的正确性;熵波对系统的低频动特性有一定影响。
Research on the low frequency characteristics of liquid propellant rocket engine oxygen system is necessary for rocket POGO analysis. Based on a LOX/kerosene staged combustion cycle engine, the linear small deviation dynamic transmission matrix model of the engine LOX system is developed by modular modeling method. The low frequency characteristics of engine system and the oxygen feed system of test stand are simulated. The simulation result is compared with the test data. The results show that the model and simulating method have considerable correctness and the entropy wave has important effect on the low frequency characteristics of the engine system.
出处
《火箭推进》
CAS
2009年第5期24-28,共5页
Journal of Rocket Propulsion
关键词
液氧/煤油补燃火箭发动机
低频动特性
传递矩阵
POGO
数值仿真
LOX/kerosene staged combustion cycle rocket engine
low frequency characteristics
transmission matrix
POGO
numerical simulation
