本文利用三维燃烧模型对CNG发动机的燃烧过程进行数值模拟,研究过量空气系数的循环变动对CNG发动机火核形成和发展及燃烧各阶段的影响.研究结果显示,过量空气系数的变动对初始火核参数的影响非常小,对燃烧过程三个阶段的影响程度也不同.主燃烧阶段受过量空气系数的变动的影响最大,火核形成和发展阶段受过量空气系数的变动的影响很小.过量空气系数的变动不是火核形成和发展产生变动的主要原因.
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