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首页> 外文期刊>Fuel >Prediction of equilibrium products and thermodynamic properties in H_2O injected combustion for C_αH_βO_γN_δ type fuels
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Prediction of equilibrium products and thermodynamic properties in H_2O injected combustion for C_αH_βO_γN_δ type fuels

机译：C_αH_βO_γN_δ型燃料在H_2O喷射燃烧中的平衡产物和热力学性质的预测

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摘要

Water and steam injection at the upstream or in the combustion chamber or using fuel-water emulsions are both well proven methods for reducing NO_x emissions and improving performance of many types of internal combustion engines. This study involves a thermodynamic simulation of water/steam injected combustion which can be used with any C_αH_βO_γN_δ type fuel and for any combustion engine. The simulation determines the mole fractions of each exhaust species at chemical equilibrium according to equilibrium-constant approach and then thermodynamic properties of the exhaust gas mixture. Previous studies about steam/water injected power systems concentrate on some particular exhaust species such as CO and NO_x and unable to predict the thermodynamic properties of working fluid accurately which is needed for an accurate performance estimation. According to previous researchers, thermodynamic properties calculated with this approach depending on the equilibrium composition are precise and can directly be used for performance estimation of combustion engines. The model gives equilibrium mole fractions, specific heat of the exhaust mixtures and adiabatic flame temperatures and results for four different fuels and varying steam/water injection ratios are presented. Apart from being directly applicable to steam/water injected power systems, the modeling process is described elaborately in order to make it adaptable for future studies such as multi-fuel or EGR applications for any desired number of exhaust species. Additionally, the equilibrium composition obtained, can also be used for determination of non-equilibrium pollutant values using existing chemical kinetics correlations in the literature. This approach provides the basic needs for the two key objectives of engine design; "performance evaluation and emission optimization" by providing an accurate method for steam/water injected power systems.
机译：在上游或在燃烧室中注入水和蒸汽，或使用燃料-水乳剂都是减少NO_x排放并改善许多类型内燃机性能的行之有效的方法。这项研究涉及水/蒸汽喷射燃烧的热力学模拟，该模拟可与任何C_αH_βO_γN_δ类型的燃料一起使用，并且可用于任何内燃机。该模拟根据平衡常数方法，然后根据废气混合物的热力学性质，确定化学平衡时每种废气的摩尔分数。以前有关注入蒸汽/水的动力系统的研究集中于某些特定的排气物质，例如CO和NO_x，并且无法准确预测工作流体的热力学性质，这是准确的性能估算所必需的。根据先前的研究人员，使用这种方法根据平衡成分计算出的热力学性质非常精确，可以直接用于内燃机的性能评估。该模型给出了平衡摩尔分数，排气混合物的比热和绝热火焰温度，并给出了四种不同燃料和变化的蒸汽/水喷射比的结果。除了直接适用于注入蒸汽/水的动力系统以外，还对建模过程进行了详细说明，以使其适用于将来的研究，例如对任意数量的排气物种使用多燃料或EGR应用。另外，使用文献中现有的化学动力学相关性，所获得的平衡组成也可以用于确定非平衡污染物的值。这种方法满足了发动机设计两个关键目标的基本需求。通过为蒸汽/注水动力系统提供准确的方法来“性能评估和排放优化”。

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  • 来源
    《Fuel》 |2013年第11期|389-401|共13页
  • 作者

    Hasan Kayhan Kayadelen; Yasin Ust;

  • 作者单位

    Princeton University, Department of Mechanical and Aerospace Engineering, Princeton, NJ 08544, USA Yildiz Technical University, Faculty of Naval Architecture and Maritime, Department of Marine Engineering Operations, Istanbul 34349, Turkey;

    Yildiz Technical University, Faculty of Naval Architecture and Maritime, Department of Naval Architecture and Marine Engineering, Istanbul 34349, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Emissions; Water emulsion; Water injection; Steam injection; Chemical equilibrium;

    机译：排放物;水乳液;注水;蒸汽注入化学平衡;

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