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Analysis of Completely Prevaporized Spray Flames with Water/Octane Core/Shell Structured Droplets

机译：水/辛烷值/壳结构液滴对完全预蒸发的喷雾火焰的分析

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摘要

A series of studies on laminar flame propagation in off-stoichiometric dilute sprays of monodispersed inert or fuel drops had been investigated by large activation energy asymptotics. The present study extends previous theoretical model to consider water/octane core/shell structured drops instead of single-phase drops. The core/shell structured drops are composed of core fluid (water) encased by a layer of shell fluid (n-octane). In this study, we only deal with the case that core/shell structured drops are vaporized completely just at flame location. Namely, the discussions of this paper are restricted to the completely prevaporized mode. By varying parameters of core water radius, core-to-shell ratio, the amount of liquid loading, and the stoichiometric ratio (lean or rich burning), we examine the gasification of core water and shell fuel of core/shell structured drops upstream of the bulk flame and its relation to the internal heat transfer. The effects of drop radius, core-to-shell ratio, liquid loading, and overall heat loss or gain on flame propagation flux are reported and discussed.
机译：通过大的活化能渐近性研究了一系列关于在非化学计量的单分散惰性或燃料滴稀释喷雾中层流火焰传播的研究。本研究扩展了先前的理论模型，以考虑水/辛烷值核/壳结构液滴而不是单相液滴。核/壳结构液滴由包裹有一层壳液（正辛烷）的核心流体（水）组成。在本研究中，我们仅处理核/壳结构液滴仅在火焰位置完全蒸发的情况。即，本文的讨论仅限于完全预蒸发模式。通过改变堆芯水半径，堆芯/壳比，液体负载量和化学计量比（稀燃或浓燃烧）的参数，我们检查了壳层上游核/壳结构液滴的核心水和壳燃料的气化大块火焰及其与内部传热的关系。报告并讨论了液滴半径，核壳比，液体载荷以及总的热损失或增益对火焰传播通量的影响。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第19期|584926.1-584926.8|共8页
  • 作者

    Hsuan Chung-Yao; Hou Shuhn-Shyurng; Lin Ta-Hui;

  • 作者单位

    Natl Cheng Kung Univ, Res Ctr Energy Technol & Strategy, Tainan 70101, Taiwan;

    Kun Shan Univ, Dept Mech Engn, Tainan 71070, Taiwan;

    Natl Cheng Kung Univ, Res Ctr Energy Technol & Strategy, Tainan 70101, Taiwan|Natl Cheng Kung Univ, Dept Mech Engn, Tainan 70101, Taiwan;

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