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Dynamics of the vortex structure of a jet impinging on a convex surface |
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| Authors: | A. S. Fleischer K. Kramer R. J. Goldstein |
| Affiliation: | a Mechanical Engineering, Villanova University, 800 Lancaster Avenue, Villanova, PA 19085, USA b Pennsylvania State University, PA, USA c Department of Mechanical Engineering, Institute of Technology, University of Minnesota-Twin Cities, 125 Mechanical Engineering Building, 111 Church Street SE, Minneapolis, MN 55455-0111, USA |
| Abstract: | Smoke–wire flow visualization is used to investigate the behavior of a round jet issuing from a straight tube and impinging on a convex surface. Video analysis of the impinging jet shows the initiation and growth of ring vortices in the jet shear layer and their interaction with the cylindrical surfaces. Effects of relative curvature, nozzle-to-surface distance, and Reynolds number on vortex initiation, vortex separation from the surface and vortex breakup are described. Examples of vortex merging are discussed. |
| Keywords: | Jet impingement Jet impingement cooling Jet dynamics Curved surface Flow visualization |
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