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Extraction of Sizes and Velocities of Spray Droplets by Optical Imaging Method  

Choo, Yeonjun (Department of Mechanical Engineering, Chonnam National University)
Kang, Boseon (Department of Mechanical Engineering, Chonnam National University)
Publication Information
Journal of Mechanical Science and Technology / v.18, no.7, 2004 , pp. 1236-1245 More about this Journal
Abstract
In this study, an optical imaging method was developed for the measurements of the sizes and velocities of droplets in sprays. Double-exposure single-frame spray images were captured by the imaging system. An image processing program was developed for the measurements of the sizes and positions of individual particles including separation of the overlapped particles and particle tracking and pairing at two time instants. To recognize and separate overlapping particles, the morphological method based on watershed segmentation as well as separation using the perimeter and convex hull of image was used consecutively. Better results in separation were obtained by utilization of both methods especially for the multiple or heavily-overlapped particles. The match probability method was adopted for particle tracking and pairing after identifying the positions of individual particles and it produced good matching results even for large particles like droplets in sprays. Therefore, the developed optical imaging method could provide a reliable way of analyzing the motion and size distribution of droplets produced by various sprays and atomization devices.
Keywords
Optical Imaging Method; Morphological Method; Spray Droplet; Particle Tracking Algorithm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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