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建立了氧化亚氮(N2O)贮箱自增压地面试验系统,针对亚牛级氧化亚氮单组元微推进系统的推进剂自增压供给过程开展了初步测试试验.基于三区域集总参数物理模型建立了氧化亚氮单组元微推进系统贮箱自增压数学模型,针对相同试验条件下的贮箱自增压过程开展了数值模拟,模拟结果与试验数据吻合较好,验证了仿真模型的准确性.仿真及试验结果均表明,为了确保推力器工作全过程中推进剂供应稳定,在亚牛级氧化亚氮单组元微推进系统的自增压过程中需要对氧化亚氮贮箱进行热量补偿来保证贮箱压力的稳定性,而贮箱压力下降速度分别随着贮箱初始充填率的减少、贮箱容积的减小及氧化亚氮质量流率的增加而增大.
A self-pressurizing ground test system of N2O tank was established and a preliminary test was carried out on the process of self-pressurizing the propellant of the sub-oxiam nitrous oxide micro-propulsion system.Based on the three-region lumped parameter Physical model The mathematical model of self-pressurization of tank for N2O monopropellant propulsion system is established. The numerical simulation of tank self-pressurization under the same test conditions is carried out. The simulation results are in good agreement with the experimental data, and the simulation The accuracy of the model.The simulation and experimental results show that in order to ensure the stability of the propellant supply during the whole operation of the thruster, it is necessary to measure the nitrous oxide storage in the process of self-pressurization of sub-level nitrous oxide monopropellant micro propulsion system Tank heat compensation to ensure the stability of the tank pressure, and tank pressure drop rate with the initial filling rate of the tank decreased, the tank volume decreases and the increase of the mass flow rate of nitrous oxide increased.