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Evaluation of Combustion Mechanism of Droplet Cluster in Premixed Spray Flame by Simultaneous Time-Series Measurement  

Hwang, Seung-Min (Department of Heanth Environment, Graduate School of Venture, Hoseo University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.6, 2009 , pp. 442-448 More about this Journal
Abstract
To evaluate the combustion mechanism of each droplet cluster downstream of the premixed spray flame, the simultaneous time-series measurements were conducted by using optical measurement system consisting of laser tomography, multi-color integrated Cassegrain receiving optics (MICRO) and phase Doppler anemometer (PDA). Furthermore, the group combustion number of droplet cluster was estimated experimentally, and the combustion mechanism of droplet cluster was examined applying the theoretical analysis. The group combustion number, $G_c$, was experimentally estimated about all droplet cluster verified by planar images, and it was classified into the internal group combustion mode and the external group combustion mode according to the theoretical analysis. It is found that there are cases in which the group combustion number estimated experimentally for droplet cluster agree or disagree with the classification by theoretical analysis. The reason of disagreement is considered due to that the group combustion number was only estimated by the geometrical arrangement of droplets in cluster, and that the actual phenomenon is three-dimensional but the measurement system is two-dimensional.
Keywords
Premixed Spray Flame; Group Combustion; Droplet Cluster; Optical Measurement; Simultaneous Time-Series Measurement;
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Times Cited By KSCI : 1  (Citation Analysis)
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