关键词: 推进剂输送;管道流;流动特性;特征线法

Abstract: This artical presents an analytical model and numerical results on priming process offeedlines nearly evacuated and prepressurized with inert gas. The priming process is described as one-dimenional fluid transient governed hy uniform distributed-parameter-model equations. Fuidcompressibility and piping flexibility are both accounted for. The numerical simulation employsmethod of characteristics with interpolation,which is specially suitable for such a complex system. Thephenomena of surge wave, line filling and surge attenuation are all demonstrated significantyl. Theanalysis shows that initial line pressure, polytropic exponent and frictional coefficient all have vitaleffects on surge pressure.

Key words: Propellant transfer;Channel flow;Folw characteristic;Method of characteristic curve