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对氢/氧气-气和气-液同轴剪切式单喷注器进行了燃烧流动的仿真研究.采用带化学反应的湍流Navier-Stokes方程和颗粒轨道模型描述发动机内部喷雾两相燃烧流动过程,气相化学反应速率都由Ar-rhenius公式计算.对典型气-气燃烧和气-液燃烧仿真结果进行了比较,结果表明气-气燃烧完成长度相对气-液燃烧更长;并进行了同轴喷注器关键参数对两种燃烧流场的影响的仿真和分析比较,得到喷注流量和动量比均为影响两类型喷注器燃烧流场的关键因素,且这两因素对燃烧完成长度的影响趋势是完全相同的,而喷注速度对两类型喷注器燃烧流场影响程度都较小.
The simulations of combustion flow in hydrogen / oxygen-gas and gas-liquid coaxial shear single injector were carried out.The turbulent Navier-Stokes equation with chemical reaction and particle orbit model were used to describe the internal combustion two-phase combustion in the engine, The gas-phase chemical reaction rate is calculated by Ar-rhenius formula. The simulation results of typical gas-gas combustion and gas-liquid combustion are compared. The results show that the length of gas-gas combustion is longer than that of gas-liquid combustion. The key parameters of the injector were compared with the simulation and the analysis of the influence of the two kinds of combustion flow field. The injection flow rate and momentum ratio were the key factors affecting the combustion flow field of two types of injector, and the influence of these two factors on the combustion completion length The trend is exactly the same, and injection speed has a smaller effect on the combustion flow field of two types of injector.