Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame
Ammonia is regarded as one of the alternative fuels because CO2 is not emitted during the combustion process of ammonia. The physical properties of ammonia are suitable for transportation and storage as a “hydrogen carrier”. Also, a large amount of ammonia can be easily produced through the Haber-Bo...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2018-02-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00526/_pdf/-char/en |
| _version_ | 1811317790904156160 |
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| author | Yohei ISHIKAWA Jun HAYASHI Hiroyuki TAKEISHI Takahiro OKANAMI Yasuyuki YAMAMOTO Kimio IINO Fumiteru AKAMATSU |
| author_facet | Yohei ISHIKAWA Jun HAYASHI Hiroyuki TAKEISHI Takahiro OKANAMI Yasuyuki YAMAMOTO Kimio IINO Fumiteru AKAMATSU |
| author_sort | Yohei ISHIKAWA |
| collection | DOAJ |
| description | Ammonia is regarded as one of the alternative fuels because CO2 is not emitted during the combustion process of ammonia. The physical properties of ammonia are suitable for transportation and storage as a “hydrogen carrier”. Also, a large amount of ammonia can be easily produced through the Haber-Bosch process with low price. To use ammonia as a fuel, it is necessary to understand the fundamental combustion characteristics of ammonia. Flammability of ammonia coaxial jet diffusion flame is important to know for developing the industrial furnace. Ammonia laminar diffusion flame is difficult to be stable under atmospheric oxidizer (O2 21%) of room temperature. In this study, therefore, the oxygen-enriched combustion is applied to make the stable ammonia laminar diffusion flame. In this study, effects of the fuel velocity and the oxidizer velocity on the ammonia laminar diffusion flame are investigated in detail under the conditions of O2 volume fraction of 24% and 25% at the burner rim thickness of 6.0 mm. Results showed that there were three regions with different extinction mechanism of the ammonia coaxial jet diffusion flame under the relatively higher fuel velocity. Particularly, the flame extinction also occurred under the low fuel velocity under the condition of O2 volume fraction of 24%. |
| first_indexed | 2024-04-13T12:14:31Z |
| format | Article |
| id | doaj.art-06280b9781a24edea72b500e0bab5963 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T12:14:31Z |
| publishDate | 2018-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-06280b9781a24edea72b500e0bab59632022-12-22T02:47:24ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612018-02-018485917-0052617-0052610.1299/transjsme.17-00526transjsmeStudy on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flameYohei ISHIKAWA0Jun HAYASHI1Hiroyuki TAKEISHI2Takahiro OKANAMI3Yasuyuki YAMAMOTO4Kimio IINO5Fumiteru AKAMATSU6Department of Mechanical Engineering, Osaka UniversityDepartment of Energy Conversion Science, Kyoto UniversityDepartment of Mechanical Engineering, Osaka UniversityDepartment of Mechanical Engineering, Osaka UniversityTaiyo Nippon Sanso Co. Ltd.Taiyo Nippon Sanso Co. Ltd.Department of Mechanical Engineering, Osaka UniversityAmmonia is regarded as one of the alternative fuels because CO2 is not emitted during the combustion process of ammonia. The physical properties of ammonia are suitable for transportation and storage as a “hydrogen carrier”. Also, a large amount of ammonia can be easily produced through the Haber-Bosch process with low price. To use ammonia as a fuel, it is necessary to understand the fundamental combustion characteristics of ammonia. Flammability of ammonia coaxial jet diffusion flame is important to know for developing the industrial furnace. Ammonia laminar diffusion flame is difficult to be stable under atmospheric oxidizer (O2 21%) of room temperature. In this study, therefore, the oxygen-enriched combustion is applied to make the stable ammonia laminar diffusion flame. In this study, effects of the fuel velocity and the oxidizer velocity on the ammonia laminar diffusion flame are investigated in detail under the conditions of O2 volume fraction of 24% and 25% at the burner rim thickness of 6.0 mm. Results showed that there were three regions with different extinction mechanism of the ammonia coaxial jet diffusion flame under the relatively higher fuel velocity. Particularly, the flame extinction also occurred under the low fuel velocity under the condition of O2 volume fraction of 24%.https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00526/_pdf/-char/enrenewable energyammonia fuelalternative fuelcarbon free fueloxygen-enriched combustionflame stabilization |
| spellingShingle | Yohei ISHIKAWA Jun HAYASHI Hiroyuki TAKEISHI Takahiro OKANAMI Yasuyuki YAMAMOTO Kimio IINO Fumiteru AKAMATSU Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame Nihon Kikai Gakkai ronbunshu renewable energy ammonia fuel alternative fuel carbon free fuel oxygen-enriched combustion flame stabilization |
| title | Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame |
| title_full | Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame |
| title_fullStr | Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame |
| title_full_unstemmed | Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame |
| title_short | Study on flame stability in oxygen-enriched ammonia/N2/O2 laminar diffusion flame |
| title_sort | study on flame stability in oxygen enriched ammonia n2 o2 laminar diffusion flame |
| topic | renewable energy ammonia fuel alternative fuel carbon free fuel oxygen-enriched combustion flame stabilization |
| url | https://www.jstage.jst.go.jp/article/transjsme/84/859/84_17-00526/_pdf/-char/en |
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