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掺氢比对低热值气体发动机燃烧性能的影响

, PP. 107-112

Keywords: 汽车工程,发动机,台架试验,燃烧性能,低热值气体,掺氢比,循环变动

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Abstract:

?基于台架试验开展了发动机燃用2种典型低热值气体燃料(煤层气、沼气)掺混氢气燃烧性能的试验研究,分析了掺氢比对发动机燃烧特性参数的影响和对低热值气体发动机燃烧稳定性的影响。结果表明:低热值气体掺混氢气后,改善了低热值气体发动机的燃烧性能,最大缸压值上升,其对应的曲轴转角前移,燃料燃烧的火焰发展期大幅降低;随着掺氢比的增加,发动机平均指示压力更加集中分布在均值附近,且掺氢比越高,效果越明显。

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