根据伯努利方程建立并联贮箱推进剂输送的数学模型, 分析了并联贮箱不平衡输出的主要影响因素在于两路减压阀出口压力偏差和金属膜片贮箱膜片压差散布, 提出以水替代有毒推进剂作为试验工质的计算方法。根据理论分析模型设计出并联贮箱不平衡输送试验系统, 利用定流量的推进剂输送系统解决金属膜片的翻转压力时刻变化的问题, 保证推进剂输送流量的稳定, 从而验证了试验系统的可行性, 为新一代运载火箭上面级并联贮箱设计提供了试验支撑。

According to the Bernoulli equation, a mathematical model of the propellant transfer in the parallel tank was established. The main influencing factors of the unbalanced propellant flow transfer in the parallel tank were exit pressure deviation of valves and differential pressure spread of metal tank diaphragm, giving a computational method of using water as the testing medium which to replace the toxical propellant. According the theoretical analysis model, an experimental system of the unbalanced propellant flow transfer in the parallel tank was accomplished, which verified the feasibility of the testing system, as the experimental basis for the designing of new generational carrier rocket upper stage. The system can stabilize the pressure change of metal tank diaphragm and propellant conveying flow by using constant flow of propellant transfer system.