TY - CONF
T1 - Flame stabilization and emission characteristics ofammonia flames in a micro gas turbine combustor
AU - Okafor, Ekenechukwu C.
AU - Sakai, Kazuma
AU - Hayakawa, Akihiro
AU - Kudo, Taku
AU - Kurata, Osamu
AU - Iki, Norihiko
AU - Kobayashi, Hideaki
N1 - Funding Information:
This research was supported by the Council for Science, Technology and Innovation (CSTI), the Cross-ministerial Strategic Innovation Promotion Program(SIP), “Energy Carriers” (Funding Agency: The Japan Science and Technology Agency (JST)).
Publisher Copyright:
© 2018 Combustion Institute. All Rights Reserved.
PY - 2017
Y1 - 2017
N2 - In order to efficiently utilize ammonia as a gas turbine fuel, it is relevant to understand the combustion characteristics of ammonia in a gas turbine combustor. In this study stabilization and emission characteristics of non-premixed ammonia flames were investigated experimentally using a micro gas turbine swirl burner. The effects of ammonia injection angle, global equivalence ratio of the non-premixed flame, and ambient pressure on flame stabilization and emissions of unburned NH3 and NO were investigated at gas inlet temperature of 298 K. One dimensional numerical calculations using ANSYS Chemkin PRO were performed to extend understanding of the experimental results. Ammonia flames were stabilized over a range of equivalence ratios. An increase in the ammonia injection angle to the burner axis resulted in increased flame stability and more efficient combustion. Ammonia emission increased with an increase in global equivalence ratio. On the other hand, NO emission decreased with global equivalence ratio owing to the increased reduction of NO by amine radicals. With an increase in pressure, NO emissions decreased due to a decrease in H and OH radicals concentration.
AB - In order to efficiently utilize ammonia as a gas turbine fuel, it is relevant to understand the combustion characteristics of ammonia in a gas turbine combustor. In this study stabilization and emission characteristics of non-premixed ammonia flames were investigated experimentally using a micro gas turbine swirl burner. The effects of ammonia injection angle, global equivalence ratio of the non-premixed flame, and ambient pressure on flame stabilization and emissions of unburned NH3 and NO were investigated at gas inlet temperature of 298 K. One dimensional numerical calculations using ANSYS Chemkin PRO were performed to extend understanding of the experimental results. Ammonia flames were stabilized over a range of equivalence ratios. An increase in the ammonia injection angle to the burner axis resulted in increased flame stability and more efficient combustion. Ammonia emission increased with an increase in global equivalence ratio. On the other hand, NO emission decreased with global equivalence ratio owing to the increased reduction of NO by amine radicals. With an increase in pressure, NO emissions decreased due to a decrease in H and OH radicals concentration.
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M3 - Paper
AN - SCOPUS:85046421793
T2 - 11th Asia-Pacific Conference on Combustion, ASPACC 2017
Y2 - 10 December 2017 through 14 December 2017
ER -