To explore the potential of ammonia-based fuel as an alternative fuel for future power generation, studies involving robust mathematical, chemical, thermofluidic analyses are required to progress toward industrial implementation. Thus, the aim of this study is to identify reaction mechanisms that accurately represent ammonia kinetics over a large range of conditions, particularly at industrial conditions. To comprehensively evaluate the performance of the chemical mechanisms, 12 mechanisms are tested in terms of flame speed, NOx emissions and ignition delay against the experimental data. Freely propagating flame calculations indicate that Mathieu mechanism yields the best agreement within experimental data range of different ammonia concentrations, equivalence ratios, and pressures. Ignition delay times calculations show that Mathieu mechanism and Tian mechanism yield the best agreement with data from shock tube experiments at pressures up to 30 atm. Sensitivity analyses were performed in order to identify reactions and ranges of conditions that require optimization in future mechanism development. The present study suggests that the Mathieu mechanism and Tian mechanism are the best suited for the further study on ammonia/hydrogen combustion chemistry under practical industrial conditions. The results obtained in this study also allow gas turbine designers and modelers to choose the most suitable mechanism for combustion studies.
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August 2017
Research-Article
Chemical Kinetic Mechanism Study on Premixed Combustion of Ammonia/Hydrogen Fuels for Gas Turbine Use
Hua Xiao,
Hua Xiao
Cardiff School of Engineering,
Cardiff University,
Room W/2.06, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: XiaoH4@cardiff.ac.uk
Cardiff University,
Room W/2.06, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: XiaoH4@cardiff.ac.uk
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Agustin Valera-Medina
Agustin Valera-Medina
Cardiff School of Engineering,
Cardiff University,
Room S/1.03a, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: ValeraMedinaA1@cardiff.ac.uk
Cardiff University,
Room S/1.03a, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: ValeraMedinaA1@cardiff.ac.uk
Search for other works by this author on:
Hua Xiao
Cardiff School of Engineering,
Cardiff University,
Room W/2.06, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: XiaoH4@cardiff.ac.uk
Cardiff University,
Room W/2.06, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: XiaoH4@cardiff.ac.uk
Agustin Valera-Medina
Cardiff School of Engineering,
Cardiff University,
Room S/1.03a, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: ValeraMedinaA1@cardiff.ac.uk
Cardiff University,
Room S/1.03a, Queen's Buildings, The Parade,
Cardiff CF24 3AA, UK
e-mail: ValeraMedinaA1@cardiff.ac.uk
1Corresponding author.
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received November 29, 2016; final manuscript received January 31, 2017; published online April 4, 2017. Assoc. Editor: Song-Charng Kong.
J. Eng. Gas Turbines Power. Aug 2017, 139(8): 081504 (10 pages)
Published Online: April 4, 2017
Article history
Received:
November 29, 2016
Revised:
January 31, 2017
Citation
Xiao, H., and Valera-Medina, A. (April 4, 2017). "Chemical Kinetic Mechanism Study on Premixed Combustion of Ammonia/Hydrogen Fuels for Gas Turbine Use." ASME. J. Eng. Gas Turbines Power. August 2017; 139(8): 081504. https://doi.org/10.1115/1.4035911
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