Abstract: The 2D and 3D supersonic combustion flowfields of hydrogen/hydrocarbon were numerically studied. Two benchmark cases, including parallel injection of hydrogen and pre burned kerosene were used to test the codes. The computational results of the supersonic mixing and combustion were compared with the available experimental data. The codes were then used to simulate the 3D vertical injection of hydrogen in a supersonic airstream. The supersonic mixing and combustion process of hydrogen can be observed clearly and the distributions of the combustion products are reasonable. The codes are proven to be capable of simulating the complex flowfields of scramjet combustor.

Key words: Supersonic combustion;Hydrogen fuel;Hydrocarbon fuel;Numerical simulation;Hypersonie ramjet engine

摘要： 采用隐式上、下三角分解(Lower UpperDecomposition)的算法,结合对组分连续方程中化学反应源项的点隐式处理,求解了多组分的N S方程组,得到了二维和三维条件下的超声速掺混及燃烧的数值模拟结果,通过与水平喷射氢气及预燃煤油等算例的验证,计算结果与实验数据基本符合。在此基础上进行了垂直喷射氢气的三维超声速燃烧的数值模拟,计算结果显示了氢气在超声速空气中掺混、燃烧的过程。该程序可进一步用来模拟超燃冲压发动机燃烧室内的复杂流场。

关键词: 超音速燃烧;氢燃烧;碳氢燃料;数值仿真;高超音速冲压发动机