冲压发动机燃油雾化过程数值计算

Numerical Investigation of Fuels Atomization in Ramjet

摘要:

对冲压发动机燃烧室内的雾化过程进行数值仿真,以研究其燃烧室中燃油喷射压力、入口来流速度等对燃油雾化特性的影响；建立了物理模型和数学模型,对燃油的喷雾混合进行了具体的数值计算。计算结果表明,喷射压力越大,贯穿距也越大；来流速度越高,雾化成的液滴颗粒直径越小；射流湍流程度越大,其喷雾锥角也变大。

Abstract:

In order to study the effects of injects of injection pressure, inlet velocity of combustor on atomization characteristics in the ramjet combustor, numerical simulation of fuels atomization in ramjet combustor was carried out. It was found that the spray penetration increased as the injecting pressure increased and droplets size increased as inlet velocity increased. Atomization angle increased as turbulence intensity increased.