关键词: 低温推进剂火箭发动机;推进剂输送;非定常流;动态特性;特征线法

Abstract: A mathematical model for the simulation of transient behavior in cryogenic rocket engine feed systems was developed The flow of cryogenic propellants in pipelines was described as quasi one dimensional flow including all regimes from sub critical to super critical state,and the two phase flow was treated homogeneously as a pseudo fluid with average properties Heat transfer mechanism between the fluid and the pipe wall was taken into account in detail Method of characteristics solutions was used to solve the conservation equations Numerical results showed that the model developed can approximately describe most important features concerned in the feed systems

Key words: Cryogenic propellant rocket engine;Propellant transfer;Unsteady flow;Dynamic characteristic;Method of characteristic;Curve