| Project/Area Number |
20K22382
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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 |
Dubey Ajit.Kumar 東北大学, 数理科学連携研究センター, 助教 (40872338)
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| Project Period (FY) |
2020-09-11 – 2022-03-31
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| Project Status |
Discontinued (Fiscal Year 2021)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | Combustion instability / Detonation / Thermoacoustics / Flame acoustic coupling / Knocking / DNS / Autoignition / Sper-Knock / Numerical Simulation |
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| Outline of Research at the Start |
Interaction of flame in an enclosure with self-generated acoustic field leads to thermoacoustic instability with disastrous consequences for engines. For complete understanding, I propose to create benchmark experiments with
geometries optimized for DNS study to create new solution methodologies.
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| Outline of Annual Research Achievements |
This project aimed to understand practical flame-acoustics interactions through optimised experiments and high fidelity numerical simulations. Substantial progress was achieved during the course of project. Experiments in small scale half-open tubes were performed as a benchmark to understand flame acoustic interactions in this acoustic condition. Such experiments were not available in the literature. Effect of ignition energy was also found. DNS of this experiment is under progress.
2D-DNS was performed for a range of thermodynamic conditions expected in modern IC engines. New modes of autoignition were found. This is very useful to understand the super-knock phenomenon in the IC engines. Results were presented in national/international conferences and several journals are under progress.
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