A study on the influence of turbulence characteristics on burning speed in swirl flow field

Title & Authors
A study on the influence of turbulence characteristics on burning speed in swirl flow field
Lee, Sang Jun; Lee, Jong-Tai; Lee, Song-Yol;

Abstract
Flow velocity was measured by, use of 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. Turbulent burning speed during flame propagation which was determined by flame photograph and gas pressure of combustion chamber was increased with the lapse of time from spark and was decreased a little at later combustion period. Because of combustion promotion effect, turbulent burning speed was increased according to increase of turbulence intensity. Burning speed ratio i.e. ratio of turbulent burning speed ($\small{S_BT}$) to laminar burning speed ($\small{S_BL}$) was found out by use of turbulence intensity u' and integral length scale $\small{l_x}$ , $\small{\delta_L}$ is width of preheat zone in laminar flame.
Keywords
Turbulent Burning Speed;Turbulence Intensity;Turbulent Scale;Mass Burned Rate;Flame Area;Burning Speed Ratio;
Language
Korean
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