摘要
采用修正的Williams硼颗粒燃烧模型对固体推进剂燃烧环境条件下的硼颗粒点火进行了数值模拟,计算了环境温度、气相氧化剂种类和分压、颗粒初始半径及氧化层厚度对硼颗粒点火的影响。结果表明,环境温度升高可以缩短硼颗粒点火延迟时间和点火时间;环境中氧分压过大会延长点火延迟时间;水蒸气分压越大,点火时间越短;硼颗粒半径增大会导致氧化层厚度增大进而延长点火时间和点火延迟时间。
The boron particle ignition in solid propellant ramjet environment was numerically simulated with revised Williams combustion model. The influences of environment temperature, the species and concentration of oxidizer, particle radius and the oxide layer thickness on boron ignition were analyzed. The caculated results show that, the ignition delay time and ignition time decrease with the increase of environment temperature or the increase of H2O vapor pressure. The ignition delay time increases with the increase of O2 pressure. The increase of boron particle radius makes oxide thickness increase, and ignition time and ignition delay time prolong.
出处
《火炸药学报》
CAS
CSCD
2008年第3期79-82,共4页
Chinese Journal of Explosives & Propellants
关键词
物理化学
固体推进剂
硼颗粒
点火过程
数值模拟
physical chemistry
solid propellant
boron particle
ignition process
numerical simulation
