2023 Fiscal Year Final Research Report
Laminar flame structures and turbulent flame characteristics of ammonia flames at high temperature and high pressure conditions
| Project/Area Number |
21H01256
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
小林 秀昭 東北大学, 流体科学研究所, 教授 (30170343)
COLSON SOPHIE 東北大学, 流体科学研究所, 特任助教 (60898386)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | アンモニア / 高圧燃焼 / 乱流燃焼 / レーザー計測 / LITGS |
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| Outline of Final Research Achievements |
Towards carbon neutrality, application of ammonia as fuel is anticipated. In a gas turbine combustor, combustion in high temperature and high-pressure conditions is employed. Therefore, turbulent combustion characteristics in high temperature and high-pressure conditions are needed to be clarified. In this study, turbulent combustion characteristics, such as instantaneous turbulent flame structure and turbulent burning velocity, were experimentally evaluated. In addition, toward the application of flame measurement in high-pressure environment, development of LITGS(Laser Induced Thermal Grating Spectroscopy) were also conducted. The results suggested that the composition of product gas affects the accuracy of derived temperature using LITGS. Also, the accuracy of derived temperature can be evaluated using the signal contrast. The results obtained in this study is needed to be considered in the temperature measurement of ammonia flame using LITGS.
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| Free Research Field |
燃焼工学
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| Academic Significance and Societal Importance of the Research Achievements |
カーボンニュートラル実現に向けて，燃料としてのアンモニア利用が注目されている．本研究は燃焼器設計において重要となるアンモニア火炎の乱流燃焼特性を実験的に明らかにした．本研究の成果は燃焼器開発のための基礎的知見となることから社会的意義は大きい．またLITGSによる温度定量計測においては，計測精度の信頼性をシグナルコントラストという指標によって評価することができる可能性を示唆した．この事は，高圧環境下における燃焼計測の妥当性を検証するうえで重要である．さらに混合気組成が温度定量計測結果に影響を及ぼす事を実験的に示した事も，今後アンモニア燃焼等への研究展開において重要な点である．
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