本文使用了直接模拟（DNS）程序计算了三维超声速湍流射流火焰。首先介绍了本程序使用到的计算方法，包括热物性参数和输运参数的计算、反应机理、边界条件、离散方法。然后，本文使用该方法计算了马赫数为12的三维超声速H2-AIR湍流射流火焰，描述了火焰的整体结构。最后，本文对火焰底部的稳燃的机理～自燃进行了分析和论证。
The DNS study of a supersonic jet flame is present in this paper. For one thing, the methodologies, including the thermal data and the transport data, reaction mechanism, boundary conditions, discretization method, are expounded. As following, the characteristic structure of a supersonic jet flame , computed with the methodologies, is described. Finally, the analysis and the evidence of the stabilization mechanism of the bottom of the flame, that is auto-ignition, are given out.
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