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首页> 外文期刊>Energy Conversion & Management >Investigating the reactivity controlled compression ignition (RCCI) combustion strategy in a natural gas/diesel fueled engine with a pre-chamber
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Investigating the reactivity controlled compression ignition (RCCI) combustion strategy in a natural gas/diesel fueled engine with a pre-chamber

机译：研究带有预燃室的天然气/柴油燃料发动机中的反应性可控压燃（RCCI）燃烧策略

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Reactivity controlled compression ignition (RCCI) concept has been proven to be a promising combustion mode for the next generations of internal combustion engines. This strategy is still subject of extensive studies to overcome its operational limitations. In the present work, the effect of using a pre-chamber to extend some operating ranges in a RCCI engine is investigated using coupled multidimensional computational fluid dynamics (CFD) with detailed chemical kinetic mechanisms. To accomplish this, the combustion and flow field in a single cylinder engine with a pre-chamber, working in RCCI mode and fueled with natural gas/diesel are numerically modeled. Experimental data is used to validate the simulation results and then, combustion characteristics and engine emissions, in some various operating regions, in terms of initial temperature, fuel equivalence ratio and portions of the two fuels are discussed. The results reveal that the proposed strategy provides the ability to extend the engine operating ranges to use lower intake temperatures, even to 50 K lower for some cases, and also using a larger portion of natural gas instead of diesel fuel: On the other hand, the new strategy could result in incomplete combustion and formation of related emissions in low loads, but for higher engine loads it shows better combustion characteristics. (C) 2016 Elsevier Ltd. All rights reserved.
机译：反应性控制压燃（RCCI）概念已被证明是下一代内燃机的一种有前途的燃烧模式。为了克服其操作局限性，该策略仍然是广泛研究的主题。在目前的工作中，使用带有详细化学动力学机理的耦合多维计算流体动力学（CFD），研究了使用预燃室来扩展RCCI发动机的某些工作范围的效果。为此，对带有预燃室，以RCCI模式工作并以天然气/柴油作为燃料的单缸发动机的燃烧和流场进行了数值建模。实验数据用于验证仿真结果，然后讨论了在某些不同运行区域中的燃烧特性和发动机排放，包括初始温度，燃料当量比和两种燃料的比例。结果表明，所提出的策略可以扩展发动机的工作范围，以使用较低的进气温度，在某些情况下甚至可以降低至50 K，并且还可以使用更大一部分的天然气代替柴油：新策略可能会导致低负荷下不完全燃烧并形成相关排放物，但是对于较高的发动机负荷，它表现出更好的燃烧特性。 （C）2016 Elsevier Ltd.保留所有权利。

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