1994 Fiscal Year Final Research Report Summary
Influence to Combustion Characteristic with Time-dependent Mixing Process of Microscopic Structure in Turbulent Diffusion Fiames
| Project/Area Number |
05452158
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Thermal engineering
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
OHTAKE Kazutomo Toyohashi University of Technology・Department of Ecological Engineering, Professor, 工学部, 教授 (80016427)
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| Co-Investigator(Kenkyū-buntansha) |
IDA Tamio Kumano Technical College Department of Mechanical Engineering, Lecturer, 機械工学科, 講師 (70193422)
NARUSE Ichiro Toyohashi University of Technological ・ Department of Ecological Engineering, Re, 工学部, 助手 (80218065)
YOSHIKAWA Norihiko Toyohashi University of Technology ・ Department of Ecological Engineering, Assoc, 工学部, 助教授 (60135423)
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| Project Period (FY) |
1993 – 1994
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| Keywords | TURBULENT DIFFUSION FLAME / FLAME STRUCTURE / GAS COMBUSTION / TURBULENT SCALE / MICROSCOPIC STRUCTURE / HIERARCHICAL STRUCTURE / RAYLEIGH SGATTERING / INFORMATION ENTROPY |
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| Research Abstract |
Space- and time-resolved information, as well as macro- and microscopic visualizations, is essential for detailed study of mixing, reaction and heat transfer mechanisms in a turbulent diffusion flame. However, turbulent diffusion flame structures have been studied almost solely by time-resolved single-point measurement due to the restriction of diagnostics. In this study, time-dependent spatial mixing processes in turbulent diffusion flame are visualized by instantaneous flame luminosity and plane Mie scattering images by an ultrahigh-speed video system (Fastcam). It is found that the auto-similarity of the instantaneous turbulent diffusion flame structure has a fractal dimension defined by fractal analysis which appears corresponding to the fractal analysis of the combustion region. Macroscopic movements of the flame region are classified in terms of the instantaneous variations of flame shape. The texture analysis resulted the relationships in flame structures in different areas. Information entropy analysis was used to get its existing probability and gave the information on the existence of wrinkling flame structures.
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Research Products
(14 results)
