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湍流燃烧的基本火焰结构是拉伸的曲面涡管;拉伸流场中的管形火焰模拟了湍流燃烧的细微结构。本文对平面预混火焰、拉伸预混火焰和管形拉伸预混火焰进行了质量、能量和组分的守恒分析。通过对比这几种火焰,揭示了火焰拉伸效果是通过优先扩散改变火焰温度和熄火极限;而火焰曲率通过增强或削弱这种优先扩散效果来影响火焰温度,影响的大小和火焰厚度与火焰半径的比值呈正比。
The basic flame structure of turbulent combustion is a stretched curved scroll; the tubular flame in the elongated flow field simulates the fine structure of turbulent combustion. In this paper, the conservation of mass, energy and composition of planar premixed flame, pre-mixed flame and tubular stretch pre-mixed flame are analyzed. By comparing these kinds of flames, it is revealed that the flame stretching effect changes the flame temperature and the flameout limit by preferential diffusion; and the flame curvature affects the flame temperature by enhancing or weakening the preferential diffusion effect, the magnitude of the influence and the relationship between the flame thickness and the flame radius The ratio is proportional.