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研究团聚硼颗粒在补燃室中的点火燃烧对提高固冲发动机性能具有重要意义。通过试验模拟固冲发动机工作过程的方法,开展了补燃室流场条件下的团聚硼颗粒点火燃烧试验。结合高速火焰图像处理技术和流场参数测量结果,对试验中团聚硼颗粒的点火燃烧状态、火焰结构以及颗粒尺寸变化等进行了分析,获得了补燃室燃气温度和氧气含量等因素对团聚硼颗粒点火燃烧过程的影响机制。对燃烧残渣进行了分析,发现燃烧前后颗粒尺寸变化不大,燃烧过程中高温气流可能进入了颗粒内部并与硼颗粒发生反应。
It is of great significance to study the ignition and combustion of agglomerated boron particles in the afterburner to improve the performance of the solid-flushing engine. Through the experiment simulating the working process of solid-flushing engine, the agglomeration boron particle ignition and combustion test was carried out under the condition of flow field in the supplemental chamber. Combining the high-speed flame image processing technology and the flow field parameter measurement results, the ignition combustion state, the flame structure and the particle size change of the agglomerated boron particles in the experiment were analyzed. Factors such as gas temperature and oxygen content in the afterburning chamber were obtained. Influence mechanism of particle ignition combustion process. The combustion residue was analyzed and it was found that the particle size did not change much before and after combustion. The high temperature gas flow in the combustion process could enter the interior of the particles and react with the boron particles.