2021 Fiscal Year Final Research Report
Control of Mixing, Diffusion, and Heat Transfer in Multiple-Arranged Round Jets
| Project/Area Number |
19K04169
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Mie University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | Multiple jets / Active control / Heat transfer / Mixing / DNS / Impinging jet / Free jet / DRL |
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| Outline of Final Research Achievements |
Multiple jets being composed of a large number of circular jets induces the occurrence of strong interference between the individual jets, resulting in some shortcomings to should be solved, i.e., the reduction of mixing/diffusion performance due to decreasing entrainment in the case of free jets; in case of the impinging jet, the suppression of heat transfer performance due to crossflow and large-scale recirculating flow and generation of non-uniform heat transfer distribution on the impinging wall. In order to comprehensively solve these problems, we investigated the control performance by applying intermittent control and control utilizing blooming jets to a single jet using our in-house computational code. Further, we developed a control method for multiple jets that improves mixing and heat transfer performance by conducting intermittent-, pulsation-, or oscillating control, and, in addition, a liquid jet control technology that enhances atomization.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
これまで単独噴流に関する制御や、多数噴流の干渉に関する影響評価は行われているが、多数の噴流を能動的に制御する試みはほとんどない。また DNS (direct numerical simulation) を利用した詳細な検討も多数噴流の場合についてほとんど行われていない。本研究で開発した多数配置された噴流への制御手法は一般の工学機器における高効率な混合・伝熱制御手法に発展寄与することができるものと考えられる。
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