Time-Resolved PIV Investigation on the Unsteadiness of a Low Reynolds Number Confined Impinging Jet

Article type: Research Article

Authors: Kim, K. C. | Min, Y. U. | Oh, S. J. | An, N. H. | Seoudi, B. | Chun, H. H. | Lee, I.

Affiliations: School of Mechanical Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea | Department of Naval Architecture and Ocean Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea | Advanced Ship Engineering Research Center (ASERC), Pusan National University, San 30, Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea

Abstract: The flow characteristics in a confined slot jet impinging on a flat plate were investigated in low Reynolds number regime by using time-resolved Particle Image Velocimetry technique. The jet Reynolds number was varied from 404 to 1026, where it is presumed that the transient regime exists. We found that the vortical structures in the shear layer are developed with increase of Reynolds number and that the jet becomes remains steady at the Reynolds number of 404. Vortical structures and their temporal evolution are verified and the results were compared with previous numerical studies.

Keywords: Impinging jet, Confined slot jet, Reynolds Number, Strouhal number, POD analysis

Journal: Journal of Visualization, vol. 10, no. 4, pp. 367-379, 2007