Hydrogen addition effects on high intensity distributed combustion

Applied Energy, Volume 104, April 2013, Pages 71–78
Hydrogen addition effects on high intensity distributed combustion
Ahmed E.E. Khalil, Ashwani K. Gupta,
Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
Abstract
Under the high intensity conditions typical of gas turbines, distributed combustion provides uniform thermal field, ultra-low pollution, enhanced stability and higher efficiency.
Mixing of the fresh air/fuel stream with hot reactive species is critical for distributed reactions and spontaneous ignition. Authors explore hydrogen enrichment of fuel, focusing on combustion stability and emissions under swirling flow conditions. They describe the role of hydrogen enrichment to methane on the combustion characteristics under fuel-lean conditions. CO emission was substantially reduced with hydrogen enrichment, with minimal effect on NO emission under premixed combustion. Hydrogen addition extended the lean operational limits of the combustor with stable combustion and no flame fluctuations or flashback. Results obtained on pollutants emission and flame marking via OH* chemiluminescence revealed near volume distributed high intensity combustion with ultra-low emission  and high performance at lower equivalence ratio.
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