2020 Fiscal Year Final Research Report
Study on powder-high-speed injection gas coupled behavior for high-performance small body exploration system
| Project/Area Number |
19K15213
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 24010:Aerospace engineering-related
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2021-03-31
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| Keywords | 航空宇宙工学 / 小天体探査 / 計算科学 / DEM-CFD / 粉体 |
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| Outline of Final Research Achievements |
To understand powder-high-speed injection gas coupled behavior on small bodies, we established a DEM-CFD coupling analysis method, and performed experiments, where compressed gas is injected to the surface of glass beads to make a crater under vacuum environment. For DEM-CFD coupling analysis, we extended the 2-D model which we had developed to the 3-D model, and confirmed that the two models are consistent with each other under certain conditions. For the experiments, we varied two parameters, initial distance between the injection tip and the surface of the glass beads and the volume of the compressed gas, and found that the former one is dominant. We also found conditions suitable for calibration with the simulation.
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| Free Research Field |
宇宙航行力学
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| Academic Significance and Societal Importance of the Research Achievements |
真空中で高速ガスの噴射により粉体が吹き上げられるという現象は非常に複雑な物理現象であり，本研究では数値シミュレーションおよび実験の両面からこの考察に取り組んでいる．特に実験では，真空環境下で高速噴射ガスによりクレーターが形成できること，およびその過程の様子が確認できており，非常に貴重なデータが得られたといえる．本現象の考察は，小天体探査における現象に限らず計算科学の分野にも貢献できると考えられる．
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