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IMPACT OF ETHYLENE AND NO ADDITION ON FUEL OXIDATION UNDER SIMULATED HCCI CONDITIONS

机译:模拟HCCI条件下乙烯和NO加成对燃料氧化的影响

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摘要

We present an investigation on the chemical influence of some exhaust gas recirculation (EGR) compounds on fuel oxidation, especially the effects of NO and ethylene. Two experimental setups were used: a homogeneous charge compression ignition (HCCI) engine and a jet-stirred reactor (JSR). The first one was chosen for its representativeness and the second one for its well-controlled operating conditions. NO and ethylene were selected because NO is known for its high reactivity and ethylene has a high concentration in the EGR gases. A complex impact of NO and little influence of C_2H_4 on the fuel oxidation kinetics were observed, in accordance with the literature. However, a synergistic effect on fuel oxidation was observed by coupling between NO and ethylene chemistry. For the fuel oxidation, a considerable inhibition at low temperatures and a significant promotion at higher temperatures were observed. These results tend to demonstrate the importance of taking into account the complexity of EGR composition.
机译:我们对某些废气再循环(EGR)化合物对燃料氧化的化学影响,尤其是NO和乙烯的影响进行了研究。使用了两个实验装置:均质充量压缩点火(HCCI)发动机和喷射搅拌反应堆(JSR)。选择第一个是因为它具有代表性,第二个是因为它的控制条件良好。之所以选择NO和乙烯,是因为NO以其高反应性而闻名,并且乙烯在EGR气体中的浓度很高。根据文献,观察到NO的复杂影响和C_2H_4对燃料氧化动力学的影响很小。然而,通过NO和乙烯化学之间的耦合,观察到了对燃料氧化的协同作用。对于燃料氧化,观察到在低温下的显着抑制和在高温下的显着促进。这些结果倾向于证明考虑到EGR组成的复杂性的重要性。

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