Kyushu University Academic Staff Educational and Research Activities Database
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Ekenechukwu Chijioke Okafor Last modified date:2022.05.06





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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/ekenechukwu-okafor
 Reseacher Profiling Tool Kyushu University Pure
Phone
092-802-3147
Academic Degree
Doctor of Engineering, Department of Mechanical Engineering Kyushu University (2015)
Country of degree conferring institution (Overseas)
Yes Bachelor
Field of Specialization
Combustion Science, Reactive Gas Dynamics, Thermal Science and Engineering
ORCID(Open Researcher and Contributor ID)
0000-0002-7396-7816
Total Priod of education and research career in the foreign country
00years00months
Research
Research Interests
  • Study of the fundamental combustion characteristics and development of combustion systems for low carbon and carbon-free fuels, etc.
    keyword : Combustion, Gas Turbine, Burners, Ammonia, Hydrogen, IC Engines, Emission control
    2010.10.
Academic Activities
Books
1. De Vries N.; Okafor E. C.; Woo Y.; Giles A.; Valera-Medina A., Techno-Economic Challenges of Green Ammonia as an Energy Vector; Chapter 7: Applications, 10.1016/B978-0-12-820560-0.00007-2, 2021.10.
2. De Vries N.; Okafor E. C.; Guesta-Bozo M.; Xiao H.; Valera-Medina A., Techno-Economic Challenges of Green Ammonia as Energy Vector; Chapter 6:Use of Ammonia for Heat, Power and Propulsion, Academic Press, 10.1016/B978-0-12-820560-0.00006-0, 2021.10.
Papers
1. Kanoshima R.; Hayakawa A.; Kudo T.; Okafor E.C.; Colson S.; Ichikawa A.; Kudo T.; Kobayashi H., Effects of initial mixture temperature and pressure on laminar burning velocity and Markstein length of ammonia/air premixed laminar flames, FUEL, 10.1016/j.fuel.2021.122149, 310, B, 2022.02.
2. Gotama G.J.; Hayakawa A.; Okafor E.C.; Kanoshima R.; Hayashi M.; Kudo T.; Kobayashi H., Measurement of the laminar burning velocity and kinetics study of the importance of the hydrogen recovery mechanism of ammonia/hydrogen/air premixed flames, COMBUSTION AND FLAME, 10.1016/j.combustflame.2021.111753, 236, 2022.02.
3. Mashruk S.; Kovaleva M.; Chong C.T.; Hayakawa A.; Okafor E.C.; Valera-Medina A., Nitrogen Oxides as a By-product of Ammonia/Hydrogen Combustion Regimes, CHEMICAL ENGINEERING TRANSACTIONS, 10.3303/CET2189103, 89, 613-618, 2021.12.
4. Okafor E.C.; Kurata O.; Yamashita H.; Inoue T.; Tsujimura T.; Iki N.; Hayakawa A.; Ito S.; Uchida M.; Kobayashi H., Liquid Ammonia Spray Combustion in Two-Stage Micro Gas Turbine Combustors at 0.25 MPa; Relevance of Combustion Enhancement to Flame Stability and NOx Control, APPLICATIONS IN ENERGY AND COMBUSTION SCIENCE, 10.1016/j.jaecs.2021.100038, 7, 2021.09.
5. Ekenechukwu C. Okafor, Hirofumi Yamashita, Akihiro Hayakawa, K. D. Kunkuma A. Somarathne, Taku Kudo, Taku Tsujimura, Masahiro Uchida, Shintaro Ito, Hideaki Kobayashi, Flame stability and emissions characteristics of liquid ammonia spray co-fired with methane in a single stage swirl combustor, FUEL, 10.1016/j.fuel.2020.119433, 287, 2020.10.
6. Okafor Ekenechukwu C .; Tsukamoto Masaaki; Hayakawa Akihiro; Somarathne KD Kunkuma A .; Kudo Taku; Tsujimura Taku; Kobayashi Hideaki, Influence of wall heat loss on the emission characteristics of premixed ammonia-air swirling flames interacting with the combustor wall, PROCEEDINGS OF THE COMBUSTION INSTITUTE, 10.1016/j.proci.2020.06.142, 38, 4, 5139-5146, 2021.01.
7. Hayakawa Akihiro; Hirano Yuta; Okafor Ekenechukwu C.; Yamashita Hirofumi; Kudo Taku; Kobayashi Hideaki, Experimental and numerical study of product gas characteristics of ammonia/air premixed laminar flames stabilized in a stagnation flow, PROCEEDINGS OF THE COMBUSTION INSTITUTE, 10.1016/j.proci.2020.07.030, 38, 2, 2409-2417, 2021.01.
8. Somarathne Kapuruge Don Kunkuma Amila; Okafor Ekenechukwu C .; Sugawara Daiki; Hayakawa Akihiro; Kobayashi Hideaki, Effects of OH concentration and temperature on NO emission characteristics of turbulent non-premixed CH4/NH3/air flames in a two-stage gas turbine like combustor at high pressure, PROCEEDINGS OF THE COMBUSTION INSTITUTE, 10.1016/j.proci.2020.06.276, 38, 4, 5163-5170, 2021.01.
9. Willyanto Anggono, Akihiro Hayakawa, Ekenechukwu C. Okafor, Gabriel Jeremy Gotama, Stevan Wongso, Laminar Burning Velocity and Markstein Length of CH4/CO2/Air Premixed Flames at Various Equivalence Ratios and CO2 Concentrations Under Elevated Pressure, COMBUSTION SCIENCE AND TECHNOLOGY, 10.1080/00102202.2020.1737032, 2020.03.
10. Okafor Ekenechukwu C .; Somarathne KD Kunkuma A .; Ratthanan Rattanasupapornsak; Hayakawa Akihiro; Kudo Taku; Kurata Osamu; Iki Norihiko; Tsujimura Taku; Furutani Hirohide; Kobayashi Hideaki, Control of NOx and other emissions in micro gas turbine combustors fuelled with mixtures of methane and ammonia, COMBUSTION AND FLAME, 10.1016/j.combustflame.2019.10.012, 211, 406-416, 2020.01.
11. Somarathne Kapuruge Don Kunkuma Amila; Okafor Ekenechukwu C.; Hayakawa Akihiro; Kudo Taku; Kurata Osamu; Iki Norihiko; Kobayashi Hideaki, Emission characteristics of turbulent non-premixed ammonia/air and methane/air swirl flames through a rich-lean combustor under various wall thermal boundary conditions at high pressure, COMBUSTION AND FLAME, 10.1016/j.combustflame.2019.08.037, 210, 247-261, 2019.12.
12. Okafor Ekenechukwu C.; Naito Yuji; Colson Sophie; Ichikawa Akinori; Kudo Taku; Hayakawa Akihiro; Kobayashi Hideaki, Measurement and modelling of the laminar burning velocity of methane-ammonia-air flames at high pressures using a reduced reaction mechanism, COMBUSTION AND FLAME, 10.1016/j.combustflame.2019.03.008, 204, 162-175, 2019.06.
13. Okafor Ekenechukwu C .; Somarathne KD Kunkuma A .; Hayakawa Akihiro; Kudo Taku; Kurata Osamu; Iki Norihiko; Kobayashi Hideaki, Towards the development of an efficient low-NOx ammonia combustor for a micro gas turbine, PROCEEDINGS OF THE COMBUSTION INSTITUTE, 10.1016/j.proci.2018.07.083, 37, 4, 4597-4606, 2019.01.
14. Kobayashi Hideaki; Hayakawa Akihiro; Somarathne KD Kunkuma A .; Okafor Ekenechukwu C., Science and technology of ammonia combustion, PROCEEDINGS OF THE COMBUSTION INSTITUTE, 10.1016/j.proci.2018.09.029, 37, 1, 109-133, 2019.01.
15. Kurata Osamu; Iki Norihiko; Inoue Takahiro; Matsunuma Takayuki; Tsujimura Taku; Furutani Hirohide; Kawano Masato; Arai Keisuke; Okafor Ekenechukwu Chijioke; Hayakawa Akihiro; Kobayashi Hideaki, Development of a wide range-operable, rich-lean low-NOx combustor for NH3 fuel gas-turbine power generation, PROCEEDINGS OF THE COMBUSTION INSTITUTE, 10.1016/j.proci.2018.09.012, 37, 4, 4587-4595, 2019.01.
16. Okafor Ekenechukwu C .; Naito Yuji; Colson Sophie; Ichikawa Akinori; Kudo Taku; Hayakawa Akihiro; Kobayashi Hideaki, Experimental and numerical study of the laminar burning velocity of CH4-NH3-air premixed flames, COMBUSTION AND FLAME, 10.1016/j.combustflame.2017.09.002, 187, 185-198, 2018.01.
Membership in Academic Society
  • Japan Society of Mechanical Engineers
  • Gas Turbine Society of Japan
  • Combustion Institute
  • Combustion Society of Japan
Awards
  • ASPACC 2021 Young Investigator Award
  • Combustion Society of Japan's Year 2021 Incentive Award
  • Combustion Society of Japan's Year 2020 Article Award
  • Combustion Society of Japan's Year 2019 Article Award
  • Best Poster and Presentation Award
  • Excellence in Oral Presentation
  • Best Science Student Award, University of Nigeria Secondary School Nsukka
  • Best Graduating Student Award, University of Nigeria Secondary School Nsukka