Modified multipurpose reduced chemistry for ethanol combustion Articles uri icon

publication date

  • May 2020

start page

  • 221

end page

  • 223

volume

  • 215

International Standard Serial Number (ISSN)

  • 0010-2180

Electronic International Standard Serial Number (EISSN)

  • 1556-2921

abstract

  • We present in this short communication a modification to our previous ethanol reduced combustion chemistry (Mill├ín-Merino, 2018) that eliminates nonphysical values of the species concentrations which we discovered in applying the mechanism to the combustion of an isolated ethanol droplet. This unsteady test is reported here to check the multipurpose character of the reduced mechanism for a problem that combines non-homogeneous autoignition, rich and lean premixed-flame propagation, and the development of a diffusion flame, as well as a the presence of a cold moving boundary at the droplet surface. During the computations, production and consumption rates of the alfa-hydroxyethyl (CH3CHOH) intermediary radical became unbalanced, invalidating its steady-state hypothesis, which was used during the derivation of the reduced scheme. This difficulty is removed here by taking CH3CHOH out of steady state, thereby augmenting slightly the reduced mechanism.