| Project/Area Number |
22K20395
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund |
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| Review Section |
0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
Xia Yu 東北大学, 流体科学研究所, 特任助教 (10945645)
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| Project Period (FY) |
2022-08-31 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | Ammonia combustion / Particle combustion / Flame propagation / Flame extinction / Turbulent combustion / co-combustion / Particles combustion / Co-combustion / Solid fuel combustion / Flame stability |
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| Outline of Research at the Start |
The present research will investigate the turbulent flame propagation and extinction behaviors and mechanisms of pure NH3, pure solid particle cloud, and solid particle cloud/NH3 hybrid mixture.Based on this study, first, the interaction mechanism between solid particle cloud combustion and gaseous ammonia combustion in co-combustion will be proposed and validated. Then, turbulent flame extinction limits and mechanism in co-combustion will be clarified. The findings of this research would help our society transition to a carbon-neutral, safety-production society.
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| Outline of Final Research Achievements |
Ammonia is a promising hydrogen energy carrier and carbon-free fuel. Co-combustion of ammonia within an existing particle-fueled thermal power plant is one of the most promising ways to step into a carbon neutral society. However, turbulent flame extinction is a significant challenge for its utilization. Therefore, through a unique self-designed turbulent combustion system, experiments on turbulent flame propagation and extinction in pure ammonia, pure particle cloud and ammonia-particle cloud co-combustion were conducted. The results showed that, in co-combustion, the particle can enhance turbulent flame propagation velocity and extend the turbulent flame extinction limits of pure ammonia combustion at ammonia-lean cases.
Through further analysis, it was found that, in co-combustion, particles have two dominant effects on the turbulent flame propagation and extinction of pure ammonia combustion, including the particle heat sink and volatile matter decomposed from the particles.
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| Academic Significance and Societal Importance of the Research Achievements |
The findings can help our society transition to a carbon-neutral with safety-production society. First,results can be used to optimize burner design and operation for co-combustion. Besides, result can be used to evaluate explosion hazard of particles-gas. New safety strategies can be developed.
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