概要
目 的
采用与火花点火往复式发动机相关的初始条件和参数, 对近化学计量氢气/空气混合物在圆柱形燃烧室内运动活塞下的燃烧进行数值研究, 并特别研究以强压振荡为特征的氢气燃烧模式是否可以被视为爆震.
创新点
1. 明确考虑了在高含氢量的火花点火发动机条件下氢气/空气混合物的燃烧情况. 2. 根据初始含氢量的不同, 燃烧可分为爆燃、 快速燃烧和缓慢燃烧三种模式. 3. 研究证明了以高幅高频压力振荡为特征的快速燃烧模式不能被视为爆震.
方 法
1. 采用“粗颗粒”数值方法求解二维圆柱坐标系下的纳维-斯托克斯气体动力方程组. 2. 模拟往复式发动机条件下可燃混合气体的动力学状态.
结 论
从输出参数 (压力振幅全程的快速傅里叶变换) 来看, 近化学计量的氢气/空气燃烧与爆震相似. 然而, 尾气区域的温度不足以使该区域发生自燃, 因此不能将该燃烧模式视为爆震.
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Acknowledgments
This work is supported by the Ministry of Science and Higher Education of the Russian Federation (No. 075-15-2020-806).
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Alexey D. KIVERIN designed the research. Anna E. SMYGALINA processed the corresponding data. Anna E. SMYGALINA wrote the first draft of the manuscript. Alexey D. KIVERIN revised and edited the final version.
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Anna E. SMYGALINA and Alexey D. KIVERIN declare that they have no conflict of interest.
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Smygalina, A.E., Kiverin, A.D. Regimes of near-stoichiometric hydrogen/air combustion under reciprocating engine conditions. J. Zhejiang Univ. Sci. A 23, 838–844 (2022). https://doi.org/10.1631/jzus.A2200217
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DOI: https://doi.org/10.1631/jzus.A2200217