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http://dx.doi.org/10.5407/JKSV.2018.16.3.016

A visualization study on flow characteristics of sweeping jet impinging on flat plate  

Kim, Sang Hyouk (Ministry of SMEs and Startups)
Kim, Hyun Dong (Rolls-Royce University Technology Center, Pusan National University)
Kim, Kyung Chun (School of Mechanical Engineering, Pusan National University)
Publication Information
Journal of the Korean Society of Visualization / v.16, no.3, 2018 , pp. 16-25 More about this Journal
Abstract
PIV experiments were carried out to visualize the velocity distribution of the sweeping jet impinging onto a flat plate and kinematic behavior of the jet from the fluidic oscillator. Two parameters such as four different Re cases and four different jet-to-wall distances were examined. Time-resolved two dimensional PIV measurements were performed for both streamwise and normal planes respect to the jet axis. Ensemble averaged and phase averaged velocity fields were obtained for the tested range of parameters. The sweeping frequency of the jet increases linearly with increase of Re. The kinetic energy of the sweeping jet decreases as the distance from the jet to the impinging plate increases. In addition, turbulence flow is generated due to the swinging motion of sweeping jet, and various vortices such as primary and secondary vortex are observed near the impinging wall.
Keywords
Fluidic Oscillator; Sweeping Jet; PIV;
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