摘要
文章以气体发生器装药燃烧模型和多孔介质理论为基础,针对两种不同燃烧性能的产气药进行仿真计算,分析降温剂孔隙率和排气孔大小对燃烧室压强的影响。结果表明排气孔直径对燃烧室压强具有临界值。当直径大于临界值时,燃烧室压强几乎不受排气孔直径影响,此时,降温剂孔隙率大小对燃烧室压强影响更大;当排气孔直径小于临界值时,燃烧室压强受排气孔直径影响更大。文章研究的计算模型可推广至所有气体发生器的仿真计算,实现结构和降温剂的优化设计。
According to the propellant combustion model of the gas generator and the porous media flow theory, the paper analyses the effects of combustion chamber pressure by cooling agent porosity and the size of the vent. The result shows that the diameter of the vent hole has a critical value for the combustion chamber pressure. When the diameter is larger than the critical value, the combustion chamber pressure is almost not affected by the size of the vent, and the porosity of the cooling agent more affects the combustion chamber pressure. When the diameter of the vent is less than the critical value, the pressure of the combustion chamber is more affected by the diameter of the vent. The calculation model proposed in this paper can be extended to the simulation calculation of other gas generators, which can realize the optimization design of the structure and cooling agent.
出处
《航天返回与遥感》
北大核心
2016年第6期39-45,共7页
Spacecraft Recovery & Remote Sensing
