| 摘要: |
| 与目前采用的肼类推进剂相比，硝酸羟胺（简称HAN）基推进剂具有无毒无污染的特点，可以简化地面操作，减小爆炸的风险和对工作人员的伤害，能极大节约发射和使用维护的成本。然而，HAN基推进剂催化分解速率比肼类推进剂慢得多，因此HAN发动机催化床预热温度越低，可靠工作越困难。对HAN基单元发动机的常温启动技术进行了研究，并对发动机常温启动和120℃启动热试车试验进行了对比分析。研究结果表明：HAN发动机可实现常温启动，但HAN基单元发动机在120℃条件下启动比常温条件下启动更快，工作寿命长；对于常温启动的试验程序，采用脉冲工作时间较短且间隔时间较长的方案，发动机启动更快，工作寿命也更长。 |
| 关键词: 无毒推进剂 单元发动机 常温启动 |
| DOI： |
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| 基金项目:民用航天技术预先研究项目（D010306） |
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| Research of HAN-Based Green Monopropellant Thruster Start under Normal Temperature |
| BAI Meishan,DAI Jia,YAO Tianliang,YANG Minglei |
| (Shanghai Institute of Space Propulsion,Shanghai Engineering Research Center of Space Engine) |
| Abstract: |
| Hydroxyl Ammonium Nitrate (HAN) based green monopropellant has drawn more attention as one of the most promising substitution of hydrazine for it can simplify the propellant transportation and storage, reduce the risk of explosion and operational hazards to human. As the activity of HAN-based green monopropellant is much lower than hydrazine propellant，the lower the catalyst bed temperature is，the harder the reliable work is. This paper studied the technology of HAN-based green monopropellant thruster start under normal temperature and these two types of starts were compared and analyzed through experiments. The results show that HAN-based green monopropellant thruster can start under normal temperature，but it starts much faster and has longer working life at 120℃ compared with starting under normal temperature. For normal temperature startup, by starting with short pulse and long interval HAN-based green monopropellant thruster starts much faster and has longer working life. |
| Key words: Green propellant Monopropellant thruster Starting under normal temperature |