Numerical study of a turbulent co-axial non-premixed flame for methanol hydrothermal combustion: Comparison of the EDC and FGM models

Mengmeng Ren, Shuzhong Wang, N. Romero-Anton, Junxue Zhao, Chong Zou, Dirk Roekaerts

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Eddy dissipation concept (EDC) model and flamelet generated manifolds (FGM) model are developed separately to study the temperature profiles and extinction limits of non-premixed hydrothermal flames. Predictions by the two models are evaluated comparatively by experimental data in literatures. FGM model shows relatively better prediction of temperature than EDC model in the near nozzle field. Extinction temperatures can be predicted by EDC model with deviations of 10–33 K. The extinction flow rates predicted by the FGM model are higher than those by the EDC model. Flow fields and reaction source terms are analysed to identify the inherent mechanism leading different results by the two models. It is illustrated that the positive effect of turbulence on reaction rate near the nozzle by the FGM model is the essential reason causing different flame characteristics from the EDC model by which the turbulence only has negative effect on reaction rate.

Original languageEnglish
Article number105132
Number of pages11
JournalJournal of Supercritical Fluids
Volume169
DOIs
Publication statusPublished - 2021

Bibliographical note

Accepted Author Manuscript

Keywords

  • Eddy dissipation concept (EDC) model
  • Extinction limits
  • Flame temperature profile
  • Flamelet generated manifolds (FGM) model
  • Hydrothermal combustion
  • Turbulence-chemistry interaction

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