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A study on the influence of turbulence characteristics on flame propagation in swirl flow field
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 Title & Authors
A study on the influence of turbulence characteristics on flame propagation in swirl flow field
Lee, Sang-Jun; Lee, Jong-Tae; Lee, Seong-Yeol;
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 Abstract
Flow velocity was measured using a hot wire anemometer. Turbulence intensity was in proportion to mean flow velocity regardless of swirl velocity. And integral length scale has proportional relation with swirl velocity regardless of measurement position. Flame speed calculated by radius of visualized flame was increased and then decreased according to lapse of time from spark. Maximum flame speed was increased according to increase of turbulence intensity. Burning speed and flame transport effect increased with increase of swirl velocity, but ratio of burning speed to flame speed decreased with increased of swirl velocity. Mass fraction burned versus volume fraction burned was increased in proportion to the increase of turbulence intensity, caused by increase of combustion promotion effect according to increase of turbulence intensity and scale.
 Keywords
Flame Propagation;Turbulent Flame Speed;Turbulent Intensity;Turbulent Scale;Transport Speed;Flame Speed Ratio;
 Language
Korean
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