Numerical Modeling of Oxy-Fuel Combustion in a Model Gas Turbine Combustor: Effect of Combustion Chemistry and Radiation Model

Mohammad Raghib Shakeel, Yinka S. Sanusi, Esmail M.A. Mokheimer*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

10 Scopus citations

Abstract

Radiation modeling and combustion chemistry are critical to accurate numerical predictions of oxy-combustion characteristics. The presence of carbon dioxide (CO2) in oxy-fuel combustion acts as diluents and significantly changes the radiative properties of the combustion gases in comparison to air combustion. In this regard, three global reaction mechanisms: Westbrook-Dryer (3 equations), Jones-Lindstedt (5 equations) and Jones-Lindstedt (7 equations) for oxy-fuel combustion of methane were combined with different weighted sum of gray gas radiation models (WSGGM) available in literature to determine the most accurate combination for methane-oxy-fuel combustion modeling and simulation. This study was carried out in a non-premixed swirl stabilized model gas turbine combustor at a firing rate of 4MW/m3-bar. The modified Westbrook-Dryer (WD-oxy) mechanism could not predict the flame attachment to the fuel nozzle at 35% CO2 addition. The combinations of Jones-Lindstedt (5 equations) reaction mechanism and WSGGM model proposed by Bordbar gave the closest approximation to our experimental observations and predicted the flame attachment to the fuel nozzle.

Original languageEnglish
Pages (from-to)1647-1652
Number of pages6
JournalEnergy Procedia
Volume142
DOIs
StatePublished - 2017

Keywords

  • Numerical modeling
  • chemical mechanism
  • combustion
  • methane
  • oxy-fuel
  • radiation

ASJC Scopus subject areas

  • General Energy

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