Abstract Acetone-n–butanol-ethanol (ABE) has proven to be a promising biofuel rather than n–butanol. Although the detailed and semi-detailed oxidation mechanisms of ABE were proposed, they were not suitable in combustion model with an acceptable timescale. Therefore, a skeletal mechanism for ABE/diesel blends combustion was developed hierarchically with the special emphasis on engine-relevant operating conditions using a decoupling methodology. It composes of 82 species and 247 reactions conformed to the combustion characteristics of nine components which are acetone, n–butanol, ethanol, ABE, diesel and four diesel surrogates including methylcyclohexane, iso–octane, toluene and n–decane. The compact-sized mechanism was benefited from acetone, n-butanol, ethanol and diesel surrogates sharing the same detailed core sub-mechanism, and their extremely simplified fuel-related sub-mechanisms. The mechanism was then fully validated against ignition delay, laminar flame speed, premixed flame species profile, and direct injection compression ignition engine combustion. The results show that the measured combustion behavior in experiments are well reproduced, indicating the current mechanism can be reliably applied to predict the ABE/diesel blends combustion in practical engines.

中文翻译：

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使用解耦方法构建用于发动机中丙酮-正丁醇-乙醇 (ABE)/柴油混合物燃烧的紧凑骨架机制

摘要 丙酮-正丁醇-乙醇 (ABE) 已被证明是一种有前途的生物燃料，而不是正丁醇。尽管提出了 ABE 的详细和半详细氧化机制，但它们不适用于具有可接受时间尺度的燃烧模型。因此，ABE/柴油混合物燃烧的骨架机制是分层开发的，特别强调使用解耦方法的发动机相关操作条件。它由82种物质和247个反应组成，符合丙酮、正丁醇、乙醇、ABE、柴油和甲基环己烷、异辛烷、甲苯和正癸烷等四种柴油替代物的9种组分的燃烧特性。紧凑型机制受益于丙酮、正丁醇、乙醇和柴油替代品，它们共享相同的详细核心子机制，及其极其简化的与燃料相关的子机制。然后针对点火延迟、层流火焰速度、预混火焰物种分布和直接喷射压缩点火发动机燃烧对该机制进行了充分验证。结果表明，实验中测量的燃烧行为得到了很好的再现，表明当前的机制可以可靠地应用于预测实际发动机中的 ABE/柴油混合物燃烧。