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首页> 外文期刊>Combustion science and technology >Effects of CO2, H2O, and Exhaust Gas Recirculation Dilution on Laminar Burning Velocities and Markstein Lengths of Iso-Octane/Air Mixtures
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Effects of CO2, H2O, and Exhaust Gas Recirculation Dilution on Laminar Burning Velocities and Markstein Lengths of Iso-Octane/Air Mixtures

机译:CO2、H2O和废气再循环稀释对异辛烷/空气混合物层流燃烧速度和Markstein长度的影响

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摘要

A laminar burning velocities database, measured by a shadowgraph method on spherical expanding flames, is still required to improve numerical simulation of kinetic mechanism. Iso-octane/air mixtures at high temperatures (373 and 423 K), high pressure (1, 3, 5, and 10 bar), and high dilution rate were studied over a range of equivalence ratios. CO2, H2O, and exhaust gas recirculation (EGR) were used as diluent over dilution range from 5 to 25 vol. An explicit correlation giving the laminar burning velocity from the initial pressure, the initial temperature, the dilution rate, and the equivalence ratio is proposed for those flames. Markstein length was also investigated under these conditions. A correlation depending on the same variables was also proposed. Particular attention was given to provide a Markstein length correlation depending on the dilution rate.
机译:仍然需要通过球形膨胀火焰的阴影图方法测量层流燃烧速度数据库,以改进动力学机制的数值模拟。在高温(373 和 423 K)、高压(1、3、5 和 10 bar)和高稀释率下,在一系列当量比下研究了异辛烷/空气混合物。CO2、H2O 和废气再循环 (EGR) 用作稀释剂,稀释范围为 5 至 25 vol%。对于这些火焰,提出了一种明确的相关性,给出了来自初始压力、初始温度、稀释率和当量比的层流燃烧速度。在这些条件下还研究了马克斯坦长度。还提出了依赖于相同变量的相关性。特别注意根据稀释速率提供Markstein长度相关性。

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