2015 Fiscal Year Final Research Report
A study on the optimum flame size and Karlovitz number to improve the burning velocity for meso-scale spherical laminar flames
| Project/Area Number |
25420162
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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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| Research Field |
Thermal engineering
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| Research Institution | Ehime University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
MUKASA Shinobu 愛媛大学, 大学院理工学研究科, 講師 (20284391)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 予混合燃焼 / 微小火炎 / 燃焼速度 / 火炎サイズ / 火炎伸長 / ルイス数 / マークスタイン数 |
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| Outline of Final Research Achievements |
This study is performed to experimentally investigate the factors that determine the optimum flame radius and Karlovitz number to improve the burning velocity of meso-scale spherical laminar flames in the range of flame radius < about 5mm, in an attempt to establish combustion enhancement methods of meso-scale flames.
As a result, it was found that the observed optimal values are little dependent on the laminar burning velocity or characteristic chemical time, but much more on the fuel types, dilution gas types and the equivalence ratio. We also proposed a method to estimate the increase in the burning velocity and equivalence ratio caused by molecular diffusion effect. Finally, it became clear that the Lewis number and the Karlovitz number play important roles in the determination of the burning velocity of meso-scale flames.
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| Free Research Field |
燃焼工学、熱工学
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