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Study on the effects of intake conditions on the exergy destruction of low temperature combustion engine for a toluene reference fuel

机译：进气条件对甲苯参考燃料低温内燃机火用能级破坏的影响研究

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摘要

Low temperature combustion (LTC) is a new mode for efficient and clean combustion in engines, and the process is mainly controlled by chemical reaction kinetics of fuel. In this paper, the numerical model of exergy analysis for LTC engine was established. The temperature, pressure and species concentration were obtained by using the homogeneous charge compression ignition (HCCI) engine model of Chemkin-Pro software with the simplified mechanism of toluene reference fuel (TRF). The exergy items were further calculated to explore the effect of different intake conditions on exergy destruction in LTC process. It was found that the irreversibility related to the combustion proceeding mainly happened in low temperature and high temperature reaction zones. With the increase of exhaust gas recirculation (EGR) rate, the proportion of working exergy increases but the irreversibility destruction of combustion decreases. Besides, N-2 component concentration in EGR gas has the greatest influence on the distribution of exergy.
机译：低温燃烧（LTC）是一种用于发动机高效清洁燃烧的新模式，该过程主要由燃料的化学反应动力学控制。建立了LTC发动机的火用分析数值模型。通过使用具有简化的甲苯参考燃料（TRF）机理的Chemkin-Pro软件的均质充量压缩点火（HCCI）发动机模型，可以获得温度，压力和物质浓度。进一步计算了火用项，以探索不同摄入条件对LTC过程中火用破坏的影响。发现与燃烧过程有关的不可逆性主要发生在低温和高温反应区。随着废气再循环（EGR）速率的增加，工作火用的比例增加，但燃烧的不可逆破坏性降低。此外，EGR气体中的N-2成分浓度对火用的分布影响最大。

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