液氧/煤油补燃发动机低频频率特性研究

Research on the low frequency characteristics of LOX/kerosene staged combustion cycle engine

基于模块化层次化的建模技术,建立液氧/煤油补燃发动机的线性小扰动频率特性仿真模型.在建模过程中,重点考虑了绝热流动假设和熵波影响下的气路模型.依据交流流体网络理论,运用传递函数法分析了该型发动机的低频频率特性,为研究液体火箭的纵向耦合振动(POGO)及发动机动力学提供帮助.

Based on the modeling technology of modularization and topology generation,a linear small perturbation dynamics transfer matrix model was developed for analysis of a LOX(liquid oxygen)/kerosene staged combustion cycle engine.In the process of modeling,the gas-path model of the adiabatic flow assumption was adopted,and the entropy wave affections were emphatically studied.As per the alternating current fluid network theory,the low frequency characteristics of the engine system were investigated by using tran...