提出了一种CH4 O2 在超声速气流中燃烧的 6方程化学反应模型 ,并且用在超声速高温空气中横向喷射的二维流场进行了数值模拟验证。特别模拟了不同来流条件和壁面条件对燃烧效率的影响及CH4 和空气中的氧气混合燃烧的过程。数值方法采用二阶精度的Harten Yee隐式TVD格式 ,计算结果表明 6方程反应模型能较好地反映CH4 O2 的燃烧过程 A six-equation chemical reaction model of CH4 O2 combustion in supersonic gas flow was proposed and verified by numerical simulations with a two-dimensional flow field transversely jetted in supersonic high temperature air. In particular, the influences of different flow conditions and wall conditions on the combustion efficiency and the process of mixed combustion of CH4 and oxygen in air are simulated. The numerical method adopts the Harten Yee implicit TVD scheme with second-order precision. The calculation results show that the 6-equation reaction model can better reflect the combustion process of CH4 O2