Abstract
The purpose of this study is the quantitative evaluation of relation between flame structure and turbulence
of gas flow under turbulent premixed combustion. To measure simply, constant volume combustion bomb
which is equipped turbulence control device is used. The authors measured the gas flow by Laser Doppler
Velocimeter, and calculated turbulence intensity as characteristic value of gas flow. Flame structure was
measured as cross sectional image by laser sheet method. To evaluate flame structure quantitatively,
periphery / periphery of ideal circle, characteristic of unevenness and fractal dimension which is calculated
by box-counting method were used. These value express complexity of flame front shape. Box-counting
method can evaluate flame shape which is chipped off part of the rim.
As results, the authors found that, in the range of 0.14-2.14m/s of turbulence intensity, unevenness of
flame front increased with turbulence of gas flow and flame growth. Although, in spite of flame size, flame
grew up with constant dimension every turbulence intensity.
雑誌名
Memoirs of the Faculty of Engineering, Miyazaki University
リポジトリのご案内
定容燃焼容器による予混合乱流燃焼の実験的研究(火炎の微視的構造とフラクタル次元)
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