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Droplet ignition of approximately continuous liquid mixtures of n-paraffins and n-alkyl aromatics

机译：正链烷烃和正烷基芳烃的近似连续液体混合物的液滴点火

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This paper presents experiments on the auto ignition of single droplets of liquid mixtures which have a composition such that their distillation behaviour approximates a "continuous" mixture, i.e. one which can be described by a continuous distribution function. A number of such mixtures of both n-paraffins and n-alkyl aromatics were designed by matching their distillation curves to those of equivalent continuous distributions, and single droplet ignition experiments were then performed on them. To correlate the results and gain insight into the mixture ignition process, a continuous mixture droplet ignition model was devised by adding a continuous formulation for a global reaction rate expression to an existing droplet evaporation model. Expressions for rate parameters as functions of the distribution variable (molecular mass) were developed from experiments on pure hydrocarbons. The resulting ignition model was found to reproduce experimental mixture ignition delay times well. The mixtures tested here behave similarly to pure compounds of the same average molecular mass. (C) 2015 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：本文提出了对具有混合物组成的单液滴自动点火的实验，该混合物的组成使其蒸馏行为接近“连续”混合物，即可以用连续分布函数描述的混合物。通过使它们的蒸馏曲线与等效连续分布的蒸馏曲线相匹配，设计了许多这样的正构烷烃和正烷基芳烃混合物，然后对其进行了单滴着火实验。为了使结果相互关联并深入了解混合物点火过程，通过向现有液滴蒸发模型添加用于全局反应速率表达的连续公式，设计了连续混合物液滴点火模型。速率参数作为分布变量（分子量）的函数的表达式是通过对纯烃的实验开发的。发现产生的点火模型很好地再现了实验混合物点火延迟时间。在此测试的混合物的行为类似于具有相同平均分子量的纯化合物。 （C）2015年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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