| 摘要: |
| 目前弹射所用低温药柱的燃烧平衡产物中含有可燃气体成分，遇初容室内氧气后发生二次燃烧，影响初容室内流场与弹射内弹道特性。为了分析二次燃烧对自力弹射方案内弹道的影响，建立了自力弹射可压缩流动仿真模型，结合有限速率化学反应模型与动网格技术，利用PISO(压力隐式算子分裂法)算法对控制方程进行数值求解。计算结果表明，二次燃烧使得初容室初始压力峰值时刻提前，并影响初始压力峰值大小。仿真分析结果为自力弹射内弹道设计提供了理论参考。 |
| 关键词: 二次燃烧 弹射内弹道 自力弹射 |
| DOI： |
|
| 基金项目:国家自然科学基金青年基金项目(5190061543) |
|
| The Impact of Afterburning on Internal Ballistic of Self-Ejection |
| PU Pengyu,MU Hongbin,HE Dingzhou,MA Baohai,NING Lei |
| (Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;China Academy of Launch Vehicle Technology, Beijing 100076, China) |
| Abstract: |
| The combustion equilibrium species of low-temperature propellant used in launches consist of some unburned gases. These gases generate afterburning when mixed with the oxygen in the initial vessel. The afterburning influences the internal flow and the performance of internal ballistic.To analyze the impact of afterburning, a compressible flow modelis established combined with finite rate chemistry and dynamic mesh to simulate the self-ejection process and the PISO algorithm is used to solve the conservative equations. The results show that the afterburning brings forward the first peak of pressure in the initial vessel and affects the peak value. The analysis provides a theoretical reference for the internal ballistic design of self-ejection. |
| Key words: Afterburning Internal ballistic of ejection Self-ejection |