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介绍了液氧和气态甲烷的低温同轴喷雾燃烧试验,试验使用了光学诊断方法如阴影法和火焰分光光谱法记录了试验中的喷雾和火焰信息,讨论了不同燃烧室压力和喷注无量纲数如韦伯数(We)和气液动量流率比下的雾化和火焰稳定情况。试验结果表明,燃烧室压力对射流雾化和火焰稳定有显著影响,增加燃烧室压力有利于火焰稳定于靠近喷注器面的地方,研究中没有发现火焰吹离距离和韦伯数之间有明显的关系式。液氧射流核心长度随气液动量流率比的增大而下降。雾化质量对液氧/甲烷同轴喷雾的火焰稳定性有明显的影响。
The coaxial low temperature co-firing experiments of liquid oxygen and gaseous methane are introduced. The optical and diagnostic methods such as the shadow method and flame spectroscopy are used to record the spray and flame information in the experiment. Different pressure and injection of different chambers are discussed. Such as the Weibull number (We) and the gas-liquid momentum flow rate ratio of the atomization and flame stability. The experimental results show that the pressure in the combustion chamber has a significant effect on jet atomization and flame stabilization. Increasing the pressure in the combustion chamber is beneficial to stabilizing the flame near the surface of the injector. No significant difference between the blow-off distance and the Weber number has been found Relationship. The length of liquid oxygen jet core decreases with the increase of gas-liquid momentum flow rate. The atomization quality has obvious influence on the flame stability of the liquid oxygen / methane coaxial spray.