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首页> 外文期刊>Combustion and Flame >Ember: An open-source, transient solver for ID reacting flow using large kinetic models, applied to strained extinction
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Ember: An open-source, transient solver for ID reacting flow using large kinetic models, applied to strained extinction

机译：灰烬：使用大型动力学模型的ID响应流的开源瞬态求解器，用于应变消光

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摘要

Simulation of quasi one-dimensional reacting flow is a standard in many combustion studies. Here Ember, a new open-source code for efficiently performing these calculations using large, detailed chemical kinetic models is presented. Ember outperforms other standard software, such as Chemkin, in computation time by leveraging rebalanced Strang operator splitting which does not suffer the steady-state inaccuracies of most splitting methods. The splitting approach and implementation used in Ember are described. Ember is validated for computation of flame extinction through imposed strain, extinction strain rate (ESR), and shown to be capable of modeling three typical experimental strained flame configurations: premixed twin flames, premixed single flames opposing inert, and diffusion flames. As further demonstration, Ember is used to investigate Lewis number effects on ESR using a detailed chemical kinetic model with 500 species for simulation of strained extinction of lean (Le > 1) and rich (Le < 1) propane/air flames. Primary trends predicted by Law (2006) using asymptotic theories of strained flames are accurately reproduced with the large, detailed chemical kinetic model. However, the complicated chemistry introduces some subtle phenomena not seen with single-step models. The Ember software is open-source and freely available to any user online.
机译：准一维反应流的模拟是许多燃烧研究的标准。在这里，Ember展示了一个新的开源代码，可以使用大型，详细的化学动力学模型有效地执行这些计算。通过利用重新平衡的Strang运算符拆分，Ember在计算时间方面胜过了其他标准软件（如Chemkin），该拆分不会遭受大多数拆分方法的稳态误差的影响。描述了Ember中使用的拆分方法和实现。 Ember经过验证，可以通过施加的应变，消光应变率（ESR）来计算火焰熄灭，并显示出能够模拟三种典型的实验应变火焰构造：预混双火焰，与惰性气体相对的预混单火焰和扩散火焰。作为进一步的证明，Ember使用详细的500种化学动力学模型研究稀薄（Le> 1）和浓（Le <1）丙烷/空气火焰的应变消光，研究路易斯数对ESR的影响。 Law（2006）使用应变火焰的渐近理论预测的主要趋势可通过大型详细的化学动力学模型准确再现。但是，复杂的化学过程会引入一些单步模型无法看到的细微现象。 Ember软件是开源的，任何在线用户均可免费使用。

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  • 来源
    《Combustion and Flame》 |2018年第9期|105-116|共12页
  • 作者

    Alan E. Long; Raymond L. Speth; William H. Green;

  • 作者单位

    Department of Chemical Engineering, Massachusetts Institute of Technology;

    Department of Aeronautics & Astronautics, Massachusetts Institute of Technology;

    Department of Chemical Engineering, Massachusetts Institute of Technology;

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

    Extinction strain rate; 1D Flames; Lewis number;

    机译：消光应变率;一维火焰;刘易斯数;

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