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Flow Characteristics of Dual Impinging Jets using PIV  

Kim, Dong-Keon (부산대학교 바이오산업기계공학과)
Kwon, Soon-Hong (부산대학교 바이오산업기계공학과)
Chung, Sung-Won (부산대학교 바이오산업기계공학과)
Park, Jong-Min (부산대학교 바이오산업기계공학과)
Choi, Won-Sik (부산대학교 바이오산업기계공학과)
Kim, Jong-Soon (부산대학교 바이오산업기계공학과)
Kwon, Soon-Goo (부산대학교 바이오산업기계공학과)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.10, no.6, 2011 , pp. 102-108 More about this Journal
Abstract
The flow characteristics of unventilated dual impinging jets were experimentally investigated. Two nozzles with an aspect ratio of 20 were separated by 6 nozzle widths. The Reynolds number based on nozzle width and nozzle exit velocity was set to 5,000. A Particle Image Velocimetry (PIV) was used to measure turbulent velocity components. It was found that, when an impingement plate was installed in the converging region, there was a stagnation region in the inner area between nozzles. However, when it was installed in the combined region, both jets were merged and collided into the plate, showing single-jet characteristics. In addition, at a dual impinging jet, as the distance between a nozzle and an impingement plate decreased, the spanwise turbulent intensity at the plate increased.
Keywords
Dual Impinging Jet; Particle Image Velocimetry; Merging Point; Combined Point; Turbulent Intensity;
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