航天器推进系统发动机动态特性研究

Dynamic Characteristics Study of Spacecraft Propulsion System Engine

以一维流体瞬变理论为基础,采用特征线有限差分格式,编制航天器推进系统液体推进剂火箭发动机动态过程的通用仿真软件,并对某多台发动机系统的动态特性进行研究。结果表明,该模型较好地描述了系统瞬变特性和水击现象,所开发的软件可方便进行其它推进系统的分析,为发动机系统设计和优化提供指导。

Based on the transient theory of one-dimensional fluid, finite difference scheme of characteristic line method is used. The general simulation software for dynamic process of spacecraft propulsion system engine is formulated. The dynamic characteristics of an engine system are studied. The results show that the model describes the system transient properties and water hammer phenomenon. The simulation software can conveniently analyze other propulsion systems and provide guidance for the design and optimization of engine systems.