Abstract
The influence of arc discharge duration on turbulent mass burning rate was investigated for turbulent r.m.s vglocities of u '=1.73 m/s and u'=4.5 nfs. Methane air mixtures were used at equivalence ratios ranging from 0.83 to / .25. Flame size was obtained through schiieren photography while the intensity Of CH chemiluminescence emissions was used to measure mass burning rate. A variable spark duration unit was used for ignition sparks and all the experiments were done in a fan stirred bomb. Discharge duration has no effect when the equivalence ratio is I. For higher values longer duration inoeases the burning rate for the early stages of the f!ame up to aflame radius of IO mm. Beyond this the duration does not affect the burning rate. Significant improvement on burning rate is observed for equivalence ratio of 0.83. This decreases as the equtvalence ratio approaches /. For equivalence ratio less than I and forflame radius less than or equal to 5.2 mm a decrease in discharge duration improves mass burning. Geometric flame stretch was found to have significant influence on the burning rate.
Recommended Citation
Mushi, E. (1994). INFLUENCE OF ARC DISCHARGE DURATION ON TURBULENT MASS BURNING RATE. Tanzania Journal of Engineering and Technology (TJET), 18(2), 123-133. https://doi.org/https://doi.org/10.52339/tjet.v18i2.180
Publisher Name
University of Dar es Salaam