An investigation was performed to determine the pressure transient levels and time required to reach pressure equilibrium in a regulated liquid propulsion system due to the priming of a propellant tank during system initiation. An experimental fluid flow test setup was designed and fabricated using a pressure vessel to house distilled water as a propellant simulant for liquid hydrazine and high-pressure gaseous nitrogen as the pressurant. A snubber orifice was installed downstream of the high-pressure gaseous nitrogen bottles to protect a regulator from high-pressure transients, prior to the regulation of incoming gas to beginning of life propulsion system propellant tank conditions. Experiments were conducted to measure pressure transients and time to pressure equilibrium by varying initial system pressures, snubber orifice diameter, and system ullage volume. A mathematical model was developed and compared against the experimental regulated system priming results to predict the system pressures and time to reach system pressure equilibrium during the pressurization period for regulated propulsion systems given initial conditions.

进行了一项研究以确定在系统启动过程中由于推进剂罐的启动而在调节液体推进系统中达到压力平衡所需的压力瞬变水平和时间。使用压力容器设计和制造实验性流体流量测试装置，以容纳蒸馏水作为液体肼的推进剂模拟物，并使用高压气态氮作为加压剂。在高压气体氮气瓶的下游安装了缓冲孔，以保护调节器免受高压瞬变的影响，然后再调节进入生命周期推进系统推进剂罐状态的气体。进行了一些实验，以通过改变初始系统压​​力，减振孔直径，和系统损耗量。建立了数学模型，并将其与实验性调节系统启动结果进行比较，以预测在给定初始条件的情况下，调节推进系统在增压期间的系统压力和达到系统压力平衡的时间。