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A Study on Combustion Characteristics of the Methane-Hydrogen Lean Mixture by Using Multiple Spark Capacity Discharge in a CVCC (II)  

Kim Bong-Seock (원주대학 동력기계과)
Publication Information
Journal of Energy Engineering / v.13, no.4, 2004 , pp. 311-318 More about this Journal
Abstract
In the present study, the combustion characteristics of methane and hydrogen-supplemented methane as alternative fuels for automotive vehicles were investigated at various hydrogen substitution rate, ignition position and ignition methods in a CVCC. The main results obtained from the study can be summarized as follow. In case of center ignition and neat methane-air mixture, the flame propagation processes are propagated with an elliptical shape, but they are changed an instable elliptical shape flame with very regular cells and higher velocity by increasing the hydrogen supplement rate. In case of side, 0.5R ignition and neat methane-air mixture, the flame propagation processes are propagated with an instable elliptical shape flame, but they are changed from an instable elliptical shape to wedge shape flame with very irregular cells and higher velocity by increasing the hydrogen supplement rate. Although the flame propagation shape with ignition position and ignition devices was not differ, the flame area of MSCDI device was a little larger than it of CDI device at the same time.
Keywords
MSCDI; CVCC; Methane-hydrogen lean mixture; Combustion characteristics;
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