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http://dx.doi.org/10.3795/KSME-B.2003.27.3.302

The Flow Characteristics of Parallel Plane Jets Using Particle Image Velocimetry Technique (I) - Unventilated Jet -  

Kim, Dong-Keon (부산대학교 대학원)
Yoon, Soon-Hyun (부산대학교 기계공학부, 기계기술연구소)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.3, 2003 , pp. 302-310 More about this Journal
Abstract
Experiments were conducted to show the characteristics of the flow on unventilated parallel plane jets. Measurements of mean velocity components and turbulent intensities were carried out with a particle image velocimetry to investigate the flow field generated by the air issued from two identical plane parallel nozzles and mixed with the ambient air. The measurements range of these experiments were Reynolds number of 5300 based on the nozzle width and the cases of nozzle-to-nozzle distance were four times. six times and eight times the width of the nozzle. Results show that a recirculation zone with a sub-atmospheric static pressure was bounded by the inner shear layers of the individual jets and the nozzles plate. The positions. where maximum value of mean turbulent intensities and mean turbulent kinetic energy show, were at the same position with the merging point. The spread of jets in the merging region increases more rapidly than that of Jets in the converging and the combined region. As nozzle-to-nozzle distances were increased. it was shown that merging and combined lengths were shorter.
Keywords
Parallel Plane Jets; Turbulence Intensity; Merging Point; Combined Point; Jet Half Width; Particle Image Velocimetry;
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Times Cited By KSCI : 1  (Citation Analysis)
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