This paper presents the modeling results of a pressure-controlled tank-to-manifold propellant cross-feed system for liquid rockets. A transient dynamic model has been developed based on the bond graph theory using AMESim software, and the predicted pressure and flow rate histories are in good agreement with experimental data. The simulation results indicate that the pressure-controlled tank-to-manifold crossfeed system requires a critical pressure to guarantee the zero consumption of orbiter propellant before booster separation, and is subject to flow transients when the crossflow is terminated. In comparison with the water fluid, liquid oxygen crossfeed has a higher critical pressure and a far more transient nature characterized by significantly aggravated priming pressure surges and high-intensity water hammer oscillations. High sensitivity to the cross-valve characteristic is found, and the equal-percentage and linear valves are recommended for the crossfeed system to avoid cavitation and to alleviate the flow transients by at least an order of magnitude.

本文介绍了用于液体火箭的压力控制的油箱-歧管推进剂交叉进料系统的建模结果。使用AMESim软件基于键合图理论开发了一个瞬态动力学模型，并且预测的压力和流量历史与实验数据非常吻合。仿真结果表明，压力控制的油箱-歧管交叉进料系统需要一个临界压力，以确保在推进器分离之前轨道推进剂的零消耗，并且在交叉流终止时会受到流动瞬变的影响。与水流体相比，液氧交叉进料具有更高的临界压力和更短暂的特性，其特征是起动压力浪涌显着加剧和高强度水锤振荡。