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首页> 外文会议>Proceedings of the 2009 spring technical conference of the ASME Internal Combustion Engine Division >ENGINE PERFORMANCE AND EMISSIONS FORMATION FOR RME AND CONVENTIONAL DIESEL OIL: A COMPARATIVE STUDY
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ENGINE PERFORMANCE AND EMISSIONS FORMATION FOR RME AND CONVENTIONAL DIESEL OIL: A COMPARATIVE STUDY

机译：RME和常规柴油的发动机性能和排放形成的比较研究

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A comparative study on engine performance and emissions (NOx, soot) formation has been carried out for the Volvo D12C diesel engine fueled by Rapeseed Methyl Ester, RME and conventional diesel oil. The combustion models, used in this paper, are the modifications of those described in [1-2]. After the compilation of liquid properties of RME specified as methyl oleate, C_(19)H_(36)O_2, making up 60% of RME. The oxidation mechanism has been compiled based on methyl butanoate ester, mb, C_5H_(10)O_2 oxidation model [3] supplemented by the sub-mechanisms for two proposed fuel constituent components, methyl decanoate, md, C_(11)H_(22)O_2, n-heptane, C_7H_(16), and soot and NOx formations reduced and "tuned" by using the sensitivity analysis. A special global reaction was introduced to "crack" the main fuel into constituent components, md, mb and propyne, C_3H_4, to reproduce accurately the proposed RME chemical formula. The sub-mechanisms were collected in the general one consisting of 99 species participating in 411 reactions. The combustion mechanism was validated using shock-tube ignition-delay data at diesel engine conditions and flame propagation speeds at atmospheric conditions.rnThe engine simulations were carried out for Volvo D12C engine fueled both RME and conventional diesel oil. The numerical results illustrate that in the case of RME, nearly 100% combustion efficiency was predicted when the cumulative heat release, was compared with the RME LHV, 37.2 kJ/g.. To minimize NOx emissions, the effects of 20-30% EGR levels depending on the engine loads and different injection strategies were analyses. To confirm the optimal engine operation conditions, a special technique based on the time-transient parametric ψ-T maps[4] has been used.
机译：已对以菜籽油甲基酯，RME和常规柴油为燃料的沃尔沃D12C柴油发动机的发动机性能和排放（NOx，烟灰）形成进行了比较研究。本文使用的燃烧模型是对[1-2]中描述的模型的修改。在汇编为油酸甲酯的RME的液体特性后，C_（19）H_（36）O_2占RME的60％。已基于丁酸甲酯mb，C_5H_（10）O_2氧化模型[3]以及由两个拟议的燃料组成成分癸酸甲酯，md，C_（11）H_（22）的子机理补充了氧化机理。通过使用敏感性分析，O_2，正庚烷，C_7H_（16）以及烟灰和NOx的形成得以减少和“调整”。引入了特殊的全局反应，以将主要燃料“裂解”为组成成分md，mb和丙炔C_3H_4，以精确地再现所提出的RME化学式。这些亚机制是从参与411个反应的99种物种中收集的。在柴油发动机工况下使用减震管点火延迟数据并在大气条件下使用火焰传播速度验证了燃烧机理。对采用RME和常规柴油两种燃料的沃尔沃D12C发动机进行了发动机仿真。数值结果表明，在RME的情况下，当累积热量释放时，与RME LHV 37.2 kJ / g相比，可预测将近100％的燃烧效率。为了最大程度地减少NOx排放，采用20-30％EGR的效果分析了取决于发动机负载和不同喷射策略的油位。为了确定最佳的发动机工况，已经使用了基于时间瞬态参数ψ-T映射的特殊技术[4]。

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