2007 Fiscal Year Final Research Report Summary
Optimum Control of Plasma Flow Systems through Multi-Scale Integration
| Project/Area Number |
17206016
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
NISHIYAMA Hideya Tohoku University, Tohoku University, Institute of Fluid Science, Professor (20156128)
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| Co-Investigator(Kenkyū-buntansha) |
HAYASE Toshiyuki Tohoku University, Institute of Fluid Science, Professor (30135313)
SATO Takehiko Tohoku University, Institute of Fluid Science, Associate Professor (10302225)
TOKUMASU Takashi Tohoku University, Institute of Fluid Science, Associate Professor (10312662)
TAKANA Hidemasa Tohoku University, Institute of Fluid Science, Assistant Professor (40375118)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Plasma / Functional fluid / Multi-scale / Nanoparticle / Complex interaction / Interface / Real time simulation / Integration |
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| Research Abstract |
In the present study, the plasma flow systems with multi-scale interactions are analyzed by using multi-scale control method and multi-scale integration to give the fundamental data for cold spray, plasma assist combustion, arc melting process and gas circuit breaker. The obtained results are as follows.
1. An integrated model for advanced cold spray process is constructed by integrating nano-micro particle flow model and coating formation model. It is clarified that electrostatic acceleration of nano-particle is effective in the presence of shock wave. The deposition process in the cavity is also clarified by comparing with cold spray experiment.
2. The pulsed arc torch and dielectric barrier discharge torch with small input power are developed to produce oxygen and nitrogen radicals and ozone for combustion assist. The effects of applied voltage and frequency on radical concentrations are clarified experimentally. Time evolution of chemical species in an air plasma are also clarified numerically using complex reaction model
3. Real time simulations are conducted for purpose of compactness of gas circuit breaker (GCB) and optimization of arc melting process. It is clarified that rough structure in the exhaust tube enhances the rapid cooling of exhaust hot gas for compact GCB. It is shown that the temperature dependent surface tension and mushy zone effect the melting pool structure in an arc-melting systems.
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[Patent(Industrial Property Rights)] エンジン2008
Inventor(s)
堤崎高司, 石川友美, 岡部仁, 西山秀哉, 片桐一成, 高奈秀匡, 仲野是克, 中嶋智樹
Industrial Property Rights Holder
本田技研工業(株)東北大学
Industrial Property Number
特願2008-13363
Filing Date
2008-01-24
Description
「研究成果報告書概要(和文)」より
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