预燃室内气氢气氧射流燃烧过程数值分析

Numerical Analysis of Combustion Processes of Hydrogen and Oxygen Jet in the Liquid Rocket Engine Preburner

建立了液体火箭发动机预燃室内气氢气氧射流燃烧过程的数学模型，包括燃烧过程控制守恒方程、湍流流动方程和湍流燃烧模型，以及求解控制方程所需的辅助关系式；给出了模拟射流燃烧过程的数值方法。对于给定的预燃室结构型式和尺寸，研究了喷嘴构型和氧的喷射方式对化学反应流场和燃烧性能的影响规律。结果表明，喷嘴构型和氧的喷射方式对流动过程和燃烧性能都有影响，且喷嘴结构的影响较为明显。

in this paper, a comprehensive numerical model is presented for simulating combustion process of gas hydrogen and oxygen jet flow in the liquid propellant rocket engine preburner, including the governing e(luations of combustion processes,k-ε turbulence model, EBU turbulence combustion model and auxiliary tormula of thermodynamic properties. With this model, numerical simulation of the effect of the injector configuration and the jet mode of gas oxygen on the flow, mixing and combustion processes was performed. The numerical results show that the injector collfiguration and the jet mode of gas oxygen have a significant effect on flow field and combustion performance.