Ember: An open-source, transient solver for 1D reacting flow using large kinetic models, applied to strained extinction
Author(s)
Long, Alan E.
Speth, Raymond L
Green Jr, William H
Date Issued
May 2018
Journal
Combustion and Flame
Publisher
Elsevier BV
Citation
Long, Alan E., Raymond L. Speth, and William H. Green. "Ember: An open-source, transient solver for 1D reacting flow using large kinetic models, applied to strained extinction." Combustion and Flame, 195 (September 2018): 105-116
Version
Author's final manuscript
Abstract
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. Keyword: Extinction strain rate; 1D Flames; Lewis number
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.combustflame.2018.05.001
