金属/水反应冲压发动机内流场数值模拟

Numerical computation of two phase flow combustion in the water ramjet

基于燃气发生器式金属/水反应冲压发动机的构成形式,建立了发动机补燃室内流场两相反应计算模型,并在该模型下对给定的贫氧推进剂配方,及某模型发动机进行了模拟,得出了不同水喷射雾化角、铝颗粒燃烧模型、铝颗粒初始直径下反应物和产物组分、温度等发动机参数的变化趋势。结果表明,水喷射雾化角大有利于水滴蒸发及其与燃气的掺混;两种不同的铝颗粒燃烧模型结果差别不大;铝颗粒初始直径的大小对发动机性能有显著影响。

Based on gas generator water ramjet, the paper discusses the numerical computation of two phase flow combustion in the motor. Simple reacting flow model of the ramjet is established to simulate the motor. The variation trend of species fractions, temperature and so on is obtained. It is shown that increase of atomizing angle and decrease of the initial diameter of particles can improve combustion efficiency. The results can be used as relevant reference for designing water ramjet.